Athena Basic Line

Maruzen, founded in 1869, is one of the reference stationers in Japan. It was also a key actor in the introduction of fountain pens in this country. Maruzen imported American and British pens in the beginning of the 20th century and became the distributor of Onoto pens in Japan in 1907. By 1915, Maruzen created the brand Athena to market domestic pens made by Eisaburo Sakasai, whose factory Maruzen bought after his demise in 1937. The production of Athena pens lasted until around 1970.

Between 1970 and 1994, the brand Athena was limited to Athena Ace inks. Athena fountain pens resurrected only in 1994 by means of some Pilot OEM fountain pens.

Athena Ace Ink from mid 1960s. JPY 50 for 30 ml.

The Athena Basic Line (ABL) is another example of Pilot OEM fountain pen. It is a flat top model, made of black plastic with rhodiated accents. The nib carries an original engraving: “ATHENA / 1869 / MARUZEN / 14K-585 / < F > ”. And hidden by the section, the manufacturing date, A505; that is, May of 2005 at the Hiratsuka plant of Pilot’s.

The shape of this pen –a flat-top— initially relates to the 70th anniversary (1988) and to its close cousin Custom 72 (1990), both implementing size 10 nibs.

But the Athena Basic Line model is much closer to two contemporary models—the Custom Heritage 91, and the Custom Heritage 912 (CH912), both from 2009. The dimensions of these three models, as can be seen on the table, are slightly different. The ABL and the CH912 use the same size of nibs, size 10. However, the Maruzen model is four millimeters shorter when closed. Their caps, though, are perfectly interchangeable and share size and shape. All three pens can use the converter CON-70 (and any of the currently made Pilot converters, save the obvious exception of the CON-W).

	Custom Heritage 91	Athena - Basic Line -	Custom Heritage 912
Length_closed	138	137	141
Length_open	122.5	122	125
Length_posted	155	156	157
Diameter	14.6	15.6	15.6
Weight (dry)	21.5	25.2	24.8
Nib size	5	10	10
Nib options	9	3	15
Price (JPY)	10000	25000	20000

Comparative table of the dimensions of these three close relatives: Pilot's Custom Heritage 91 and 912, and Athena Basic Line. Lengths measured in millimeters, weights in grams, prices in JPY without taxes.

On both pictures, from top to bottom, Pilot Custom Heritage 912, Athena Basic Line, and Pilot Custom Heritage 91.

The price of the Basic Line was JPY 25000, plus tax. That is JPY 5000 more expensive than the CH912, and JPY 15000 more than the Custom Heritage 91 with size 5 nib. These differences in price are common between official products and the OEM pens made for other companies.

The Athena Basic Line. The clip is engraved with the brand name: "ATHENA". The cap ring carries another engraving: "MARUZEN JAPAN Basic Line Athena".

On the nib we can read "ATHENA / 1869 / MARUZEN / 14K-585 / < F >".

In actual terms, the Maruzen model, the Athena Basic Line can be seen as a forerunner of the Custom Heritage models that would appear about four years later, in 2009 (year 91 in Pilot’s era).

Sheaffer’s TM Admiral – Pilot Iroshizuku Ku-jaku

Bruno Taut
Chuo and Nakano, June 17-21 2017
etiquetas: Pilot, Maruzen

On Ban-ei Nibs

On this text, some more notes on Ban-ei (挽栄) pens, including some corrections to my own words.

These pens made by Sakai Eisuke (酒井栄助) and coworkers (Kabutogi, Takahashi, Tsuchida, Kitamura, Nakamura) are difficult to follow. They are, for the most part, unmarked with any brand name, and as a result they are invisible to many aficionados.

Ebonite bodies, often lacquered, occasional maki-e and urushi-e motifs, mostly gold nibs, Japanese eyedropper filling system (albeit with exceptions), teardrop clips… All these are some usual features of Ban-ei pens, but in no case are they exclusive to them.

The only element in Ban-ei pens that carried some sort of marking were the nibs, although not always. Many of these pens implemented nibs made by Kabutogi Ginjiro (兜木銀次郎), and these were more often than not labeled in one way or another—either through some JIS number (3233, 4622, 4922), some of the brands owned by this nibmeister or, more often, through the initials GK.

An Onoto-type pen made by Sakai Eisuke and Kabutogi Ginjiro.

On this case, the nib is labeled with the brand name "Steady", one of the brands registered by the nibmeister Kabutogi Ginjiro. Its JIS number was 3233, but it is not engraved on this particular nib.

A balance model with the wrongly named "Kamakura bori" decoration.

The nib is marked with the JIS no. 4622, associated to the factory Kabutogi Seisakusho Tabata and to the brand name Seilon.

However, Ban-ei pens also implemented a number of other nibs, and many were simply not signed at all. In particular, Ban-ei used Platinum and Sailor nibs. On both cases, the engraving was the same: “WARRANTED / 585 / 14 KARAT / PEN / IRIDIOSUMIN”, but their geometries are different, as can be seen on the picture.

Two Ban-ei pens with very different nibs--Sailor on the left, Platinum on the right. The later belongs to the Danitrio-commissioned series.

Close up of the nibs. Sailor on the left, Platinum on the right. The engraved text is the same --“WARRANTED / 585 / 14 KARAT / PEN / IRIDIOSUMIN”--, but not so is the size of the fonts. The Platinum nib is flatter than the Sailor.

In the mid 1990s, as we have already seen on these Chronicles, the company Danitrio commissioned some pens to the old troupe of artisans. On this occasion, the pens were properly labeled as “Ban-ei - 挽栄” on the cap lip, thus eliminating the anonymity of the previous works. Regarding the nibs of these pens, there is some conflicting information. For the most part, the nibs of the Danitrio Ban-ei pens are Platinum, but there is also a small batch of nibs carrying a special engraving: 復刻手造万年筆 (fukkoku tezukuri mannenhitsu), reissue hand-made fountain pen. The geometry of these nibs differs greatly from those made by Platinum. It is, in fact, very close to the geometry of the nibs signed with the initials GK.

Danitrio founder Bernard Lyn suggests on this book Maki-e, an Art for the Soul (Dani International Corporation, 2003) that it was Kabutogi’s son, by the name of Toshiya, the new nibmeister of the Ban-ei team after his father (Gingiro) had passed away. And I reproduced this idea on these same pages. However, further investigations in Tokyo pointed out that Kabutogi Toshiya was not a nibmeister and could not be the artisan behind those nibs. Sure enough, he had good contacts in Tokyo and probably access to old spare parts. The consequence of all this, then, is that we might need to add a pinch of salt to the claim that those nibs had been made by Kabutogi’s son.

Four Ban-ei pens. Clockwise from the red urushi pen: Danitrio Ban-ei with the special engraving (復刻手造万年筆) nib, balance model with "nashiji" decoration and GK nib, Danitrio Ban-ei with "nashiji" decoration and Platinum nib, and balance model with maki-e decoration (rabbit and moon motif) and Sailor nib.

Close up of the previous pens. Note the similar geometry of the two nibs on the back--the one with the special engraving and the GK nib. Both are very cylindrical and have heart-shaped breathing holes.

In fact, Mr. Eizo Fujii never mentions the figure of Kabutogi Toshiya on his article “The fountain pens of Sakai Eisuke” (Shumi-no Bungubaku, 34, p. 120-124). On it, Mr Fujii mentions Kabutogi Ginjiro and Platinum as the sources for the nibs of the Danitrio Ban-ei pens.

Lambrou and Sunami, on their side, speak of early Ban-ei pens equipped with nibs manufactured by Ishikawa Kinpen Seisakusho (JIS no. 3231), from Tokyo. This company provided nibs to a number of makers, including Ferme.

A Ban-ei with a Henckel nib made of steel.

A Henckel nib (JIS no. 3417). There are no records of any collaboration between Henckel and Sakai Eisuke, but there are a number of Ban-ei pens out there with this same nib.

Finally, there are some Ban-ei pens sporting exotic nibs. Certainly, many of them are the result of absurd combinations often driven by necessity. But some others are not so easy to diagnose. A case in point is a group of Ban-ei pens implementing steel nibs manufactured by Henckel (JIS no. 3417). There are no records, apparently, of such collaboration, but it is also unusual to see a number of pens with the very same nib. Some aficionados have suggested that these Henckel nibs were attached to remaining Ban-en bodies that were never put to sale.

The obvious conclusion is the variety of sources to the nibs implemented by Sakai Eisuke and collaborators. Those made by nibmeister Kabutogi Ginjiro are indeed relevant and even common, but by no means are those GK nibs the only ones; not to mention that this nibmeister was very prolific and worked for a number of brands.

In any event, what matters here is that Ban-ei pens are still a mystery. But that might be the fate a small and artisanal operation with few written records. And some people indeed feel the strong appeal of these almost anonymous pens.


References:
Bernard LYN. Maki-e, an Art for the Soul. Dani International Corporation, 2003.
Eizo FUJII. “酒井栄助の万年筆” (Sakai Eisuke no mannenhitsu; The fountain pens of Sakai Eisuke). Shumi-no Bungubaku, 34, p. 120-124 (2015).
A. LAMBROU & M. SUNAMI. Fountain Pens of Japan. Andreas Lambrou Publishers Ltd., 2012.

Sheaffer 1250 – Pilot Iroshizuku Ku-jaku

Bruno Taut
Nakano, June 14th, 2017
etiquetas: Ban-ei, Platinum, Sailor, plumín, Sakai Eisuke, nibmeister Kabutogi Ginjiro, Danitrio, Ishikawa Kinpen Seisakusho, Ferme, Henckel

Onoto Type by Sakai Eisuke

Ban-ei pens have shown up several times on these Chronicles and the basic data are is well known. But the devil is in the details: Sakai Eisuke and his team did not leave much information behind and any pen can be a source for more knowledge.

The following pen seems to have been made in the 1960s. It is an “Onoto-type” pen, so popular in Japan even nowadays. On the information sheet accompanying we can read that this is a pen inspired on the Onoto model of 1918, with a plunger filling system. Needless to say, the Japanese pen does not use any self-filling operation but the very dear Japanese eyedropper system (::1::, ::2::) derived from the old Onoto plunger.

On this picture, both threads of the ink deposit and of thr shut-off valve are half unscrewed.

This pen is designed to be posted, although the final length is quite long--180 mm.

Classical design of the section of an "Onoto-type" Japanese pen.

The information sheet also states that the pen is the work of just two people—Kabutogi Ginjiro, nib, and Sakai Eisuke, body. And the two other regular actors of the Ban-ei group, Tsuchida and Takahashi, are absent, which points out at the idea of this being a precursor of what later would become the Ban-ei/Tsuchida brand of pens. But, to what are we calling Ban-ei or Tsuchida pens?

The information sheet signed by Kabutogi Ginjiro (兜木銀次郎) and Sakai Eisuke (酒井栄助).

The nib, made of 14 K gold, is engraved with the name of one of the Kabutogi’s registered brands—Steady: “K14 / Steady / Special / Perfect / -<3>- / Pen”.

The Steady nib made by Kabutogi Ginjiro (JIS no. 3233, although there is no JIS mark on this nib).

These are the dimensions of this Onoto-style pen:

Length closed: 147 mm
Length open: 142 mm
Length posted: 180 mm
Diameter: 11.0 mm
Weight: 11.8 g (dry)
Ink deposit: 2.8 ml

This particular pen was commissioned by Seibu Department Stores in Tokyo.

The weak point in the Japanese eyedropper pens--the point where the rod operating the shut-off valve enters the ink deposit.

The weak point of this pen is the back seal between the valve rod and the ink deposit. This is the main source of problems in Japanese eyedropper pens.

Sailor Profit, Naginata Togi – Tomikei Blue.

Bruno Taut
Nakano, March 21st, 2017
etiquetas: Ban-ei, Kabutogi Ginjiro, Steady, Onoto, Sakai Eisuke

Sailor's Plunger

Plungers are old and new, particularly in Japan. Some of the first fountain pens arriving in this country were Onoto plunger fillers, and the well known Japanese eyedropper system (::1::, ::2::) of storing ink in the pen is a simplification of the original Onoto system.

However common the Japanese eyedropper is, Japanese companies continued making plungers for some of their models. Pilot’s examples, the P type, are well documented, but these are by no means the only ones.

This is a Sailor, not an Omas.

The clip is clearly signed as Sailor.

Sailor also made some, and such is the case of the pen on display today. It is a small celluloid pen made around 1935. The nib, not that big, is labeled as being a size 20.

The size-20 nib. The engraving reads "14 CR GOLD / Sailor / REGISTERED / PATENT OFFICE / -20-".

These are the dimensions of this pen:
Length closed: 124 mm
Length open: 112 mm
Length posted: 151 mm
Diameter: 11 mm
Weight: 15.2 g (dry)

The plunger, half retracted.

The basic problem of this filling system is its vulnerability. It is very fragile and prone to break down due to failures in the plunger seal.

The plunger, disassembled.

My thanks to Mr. Sugimoto and to Mr. Mochizuki.

Pelikan M800 – Tomiya Tomikei Blue (by Sailor)

Bruno Taut
Nakano, April 25th, 2016
etiquetas: Japón, soluciones técnicas, Sailor, Pilot, Onoto

Sistemas de sellado (I)

Lo que uno da por descontado a veces resulta que es extraño y desconocido. Cierto es, por otro lado, que la documentación en castellano sobre estilográficas japonesas es escasa. En esta Crónica voy a tratar de explicar el desarrollo de los sistemas de sellado que se dan a lo largo de la historia en las plumas japonesas. Primero hablaré del sistema de válvula accionada desde el culotte. En la segunda parte hablaré del sistema de estrellas. Ambas cuestiones han sido tratadas ya en estas páginas, pero tal vez no esté de más recuperar esa información ahora en castellano.

Las Onoto con sistema de llenado plunger filler estaban entre las primeras plumas que llegaron a Japón a finales del s. XIX y principios del XX y tuvieron mucho éxito en este país. De hecho, algunas de las primeras plumas con marca japonesa fueron hechas por Onoto (De la Rue) para la tienda Maruzen, bajo la marca Orion. Algunas de ellas, en 1910, ya incorporaban un sistema de cuentagotas “sin plunger”; es decir, una pluma por goteo en la que quedaba el vestigio evolutivo del eje del plunger que tan solo actuaba como válvula de sellado del depósito de tinta.

Anuncio de una Onoto de principios del s. XX en la que utiliza el argumento de que con la válvula del propio plunger cierra el depósito y evita fugas indeseadas de tinta. También añade que con esa válvula se puede controlar el flujo de tinta. También es ese el caso de las plumas de cuentagotas japonesas.

Y en la mentalidad simplificadora de los japoneses, algunos fabricantes ya realmente japoneses –Oliver y la Swan japonesa de Nobuo Itô— tomaron buena nota de esta evolución y lo utilizaron en sus propias plumas.

La idea, dicen algunos, estaba asociada al temor a ensuciar los valiosos kimono con manchas de tinta. No me cabe la menor duda que los japoneses quisieran evitar manchas, pero lo mismo se puede decir de los estadounidenses o británicos y de sus trajes... Sí es cierto que el clima angustiosamente húmedo de Japón hace de las cuestiones de limpieza una obsesión nacional y tal vez esa sea la razón última de ese temor reverencial. Por otro lado, en el Japón de principios del s. XX, bien pasada ya la restauración Meiji (1867), el uso de los trajes occidentales ya era común.

En cualquier caso, estas empresas empiezan a hacer plumas de cuentagotas con un añadido: una válvula que cierra el paso de tinta a la boquilla que se acciona desde el culotte de la pluma. Esa válvula está cerrada cuando la pluma no está en uso y se abre, con apenas una vuelta del culotte, cuando se necesita usar la pluma. También se puede usar para regular el flujo de tinta en el plumín.

En esta Platinum con decoración maki-e de los años 30 el culotte está levemente desenroscado; es decir, en posición de escritura.

El sistema tuvo éxito y al cabo se le denomina, en inglés, Japanese eyedropper. El término japonés es inkidome-shiki, e implica necesariamente la existencia de un sistema de sellado de la tinta. Este sistema es el habitual entre las plumas japonesas de cuentagotas y es muy raro ver plumas de cuentagotas sin ese sistema de sellado. La excepción, menor, son las hoshiawase, que serán objeto de otra Crónica posterior.

Prácticamente, todas las marcas japonesas han usado este sistema en algún momento de su historia. Incluso hoy en día está en uso: Pilot lo usa en las Namiki con plumín de tamaño 50; para Nebotek es uno de sus tres sistemas de llenado. Danitrio, desde California, se empeña en utilizarlo en su afán de ser tan japonesa como la que más. Y en el pasado, la mencionada Swan (la japonesa), más SSS, Platinum, Sailor, Diamond, Ban-ei, Asahi Tsubasa... y todas las plumas jumbo, sobredimensionadas, de muchos fabricantes.

Una New Clip, tal vez fabricada por Fukunaka-Seisakusho. Se trata de una pluma jumbo con llenado por cuentagotas con válvula de sellado. La capacidad del depósito de tinta es de unos 8 mililitros. Suficientes como para crear una gran mancha.

Es un sistema interesante y divertido, pero tiene un par de inconvenientes. El primero es que interrumpido el paso de tinta entre el plumín y el depósito, el primero se seca muy rápidamente cuando no está en uso. Arrancar es a menudo un poco engorroso.

Una Swan japonesa (de Nobuo Itô) de alrededor de 1915. Junto a la parte trasera de la boquilla se puede ver la pieza cónica de cierre asociada al eje que, por dentro del cuerpo, se conecta con el culotte, tal y como se ve en la foto siguiente.

El culotte de la pluma anterior completamente desenroscado.

El segundo problema es el sellado del sistema en la parte cercana al culotte. La válvula se acciona desde el culotte a través de una varilla axial que entra en el depósito a través de un sello tradicionalmente de corcho. Este sello es muy vulnerable y es necesario reemplazarlo en prácticamente cualquier pluma de este tipo que uno pueda encontrar hoy en día en tiendas o mercadillos. De no hacerlo, la tinta se va a acumular en la cámara del culotte y va a salir en cuanto se desenrosque para escribir. En algunos modelos nuevos (los de Nebotek, por ejemplo) ese sello es ahora de un elastómero sintético.

En conclusión, las plumas de cuentagotas con válvula de sellado accionada desde el culotte son un producto netamente japonés que ha permanecido en el mercado durante los últimos cien años, que es prácticamente toda la historia de las plumas en Japón. Son fáciles de encontrar en plumas tanto viejas –aunque en ellas se impone una restauración a fondo— como en modelos nuevos. En este último caso, las plumas de cuentagotas corresponden, paradójicamente, a modelos caros.

Y en una segunda parte hablaré de otro sistema de sellado: el sistema de estrellas.


Mi agradecimiento a mis amigos del Foro de Estilográficas.


P. S: A principios de 2014, Nebotek cambió su nombre por el de Eboya.

Platinun Belage – Platinum Pigmented Blue

Bruno Taut
Yokohama, 14-17 de junio de 2013
Etiquetas: soluciones técnicas, Japón, Pilot, Orion, Maruzen, Sailor, Platinum, SSS, Swan (Japón), Danitrio, Nebotek, Asahi Tsubasa

Pilot's Safety

This is not the first time we see a safety pen on these Chronicles. During the early days of Namiki Mfg. Co. five filling systems were implemented in Pilot pens—the O-shiki (O-式, eyedropper filler with shut-off valve), the T-shiki (T-式, lever-filler), the N-shiki (N-式, hoshiawase), P-shiki (P-式, plunger filler) and the L-shiki, (L-式) the retractable-nib safety system shown today.

The hoshiawase system is the only original innovation by Pilot at the time, The rest of systems were copied from Western products (plunger filler, lever filler and safety), or from other Japanese companies –Maruzen had marketed and manufactured eyedroppers with shut—off valve derived from Onoto’s plunger fillers around 1910, and on these Chronicles I already showed a Japanese Swan with that same system from ca. 1915.

Other Japanese companies made safety pens—Sailor, Platinum, SSS, Itoya…—, but they are hard to find nowadays, and that makes these finds all the more valuable. This safety pen in particular is in immaculate condition—most likely, it was never inked. The decoration and imprints on the black ebonite barrel look like fresh out of the production line.

The pen sports a replacement nib. It is a very flexible unit, made in 1930, of size 3 in 14 K gold labeled as steno (for shorthand writing). It is perfectly identified as made by Pilot, as has always been the case with Pilot and Namiki nibs. The barrel, on its side, carries the brand and the company names: “PILOT / NAMIKI MFG: CO. / MADE IN JAPAN”. The production date is around 1925.

The imprint on the nib reads as follows: "STENO / 14 KARAT GOLD / PILOT / REGISTERED / -3-".

These are its dimensions.
Length capped: 118 mm
Length open (nib extended): 124 mm
Length posted (nib extended): 151 mm
Diameter: 12 mm
Weight (dry): 13.7 g

My thanks to Mr. Sugimoto.

Platinum 3776 Century, music nib – Platinum Pigmented Blue

Bruno Taut
Shinjuku, May 16th, 2013
etiquetas: Pilot, soluciones técnicas, Japón

NOTE ADDED ON MAY 22nd: The nib is not original. The replacement nib shown on the pictures was made in 1930. My thanks, once again, to Mr. Sugimoto.

Nebotek

Nebotek is one of the small operations—that is, other than the big three—producing pens in Japan. Its mother company is Nikko Ebonite, established in 1952 as manufacturer of ebonite (vulcanized hard rubber), a material with a number of applications. Nikko Ebonite is also the supplier of this material for all Japanese fountain pen manufacturers with the sole exception of Hakase. So, creating their own pen brand was only natural, and that happened in 2009.

Assorted Nobotek pens at a sale event in a department store in Tokyo.

Nebotek pens are created by Mr. Kanesaki Noritoshi　(金崎徳稔), disciple of the well know (well, in Japan) nibmeister Kubo Kohei　(久保幸平), now almost completely retired. Mr. Kanesaki lathes the in-house ebonite to make fountain pens and ball-pens. Fountain pens come in three different filling systems: (international) cartridge-converter, button filler, and eyedropper with shut-off valve. Nibs and feeds are provided by Peter Bock, in Germany, and are available in four points: F, FM, M, and B. They can also be made soft (springy).

Currently, the pens carry no inscription naming the maker or the model. They look anonymous save for the nib, imprinted with the Bock logo. So, the unknowing user might take this pen as a no-brand pen or as a German pen made by Bock itself.

The Nebotek Onoto-type.

The following pen is one of the Nebotek models. It is called Onoto-type, and it indeed resembles the old Onotos that arrived in Japan at the break of the twentieth century. This pen is an eyedropper with shut-off valve manned from the tail. It is medium sized out of the three possibilities (S, M, L). The nib is a size 220 (in the Bock catalog) made of 14 K gold. These are the pen dimensions:

Length closed: 141 mm
Length open: 134 mm
Length posted: 175 mm
Diameter: 15 mm
Weight (dry): 23.4 g

A typical Japanese eyedropper pen.

The Bock nib, engraved with the Bock logo.

Nobotek pens are indeed good and interesting products, but its poor marketing makes them almost unknown. And anonymous.


P. S: Around January 2014, Nebotek pens changed its name to Eboya.

Pilot Super (cartridge-converter), soft nib – Pelikan 4001 Brilliant Brown

Bruno Taut
April 5th, 2013
etiquetas: Nebotek, Bock, Eboya, Kanesaki Noritoshi

Double Flow

I often wonder how special the Japanese fountain pen market was. There were, in this market, a large number of unique technical solutions—hoshiawase, shut-off valve, hose filler, A filler (A-shiki), easy drink filler… Japan seems, at times, a large laboratory for new solutions, although most of them never left the country.

The very rare Double Flow Fountain Pen.

Such is the case of today’s pen—a Double Flow Fountain Pen. Apparently, it is just a BCHR pen in the very traditional shape of Japanese eyedroppers, often called Onoto shape. Usually, the tail operated the shut-off valve. But that is not the case of this pen.

The engraved marks on the section are similar to those of a hoshiawase pen.

The pen has two concentric ink deposits--the innermost is attached to the section on the picture. The ourtermost is the barrel (on the background), as is the case on all eyedropper pens.

On this picture, both deposits are dettached from the section.

This pen is still an eyedropper, but it lacks any shut-off valve. In exchange, it has two concentric ink deposits inside the barrel, and the section has separate channels for each deposit. On the outside, the gripping section has some engraved marks—similar to those in a hoshiawase pen—to select the deposit from which the ink would feed the nib. Three are the options: outer, inner, and a mixture of both. Needless to say, the inks used with this pen had to be compatible; that is, mixable as the mixture would take place directly in the feed.

This picture shows the back of the section. The wider thread attaches the barrel; the smaller, the inner deposit for the second ink. Two feeding holes are visible--the central for the innermost deposit, and the lateral one for the outer reservoir.

The Double Flow Fountain Pen together with a copy of the instruction sheet.

In summary, this Double Flow Fountain Pen, such was its name, is a dual eyedropper with an ink selecting mechanism. Very few units of it are known, and on the one here shown, the nib is a later replacement. There exist, however, some instruction sheets. On it, the manufacturer explains that this dual flow system had been patented in Japan (patent number 36005), and that applications had been filed for patent in Britain, USA, France, and Italy. It dates back from the mid 1920s.

Indeed another original solution of the Japanese laboratory.

My thanks to Mr. Sugimoto.

Platinum 18K full size pen (ca. 1970) – Pelikan 4001 Royal Blue

Bruno Taut
Yokohama, December 31st, 2012
labels: soluciones técnicas, Japón, Double Flow, tinta