Footnote

The world of prototypes is an uncharted one. And that despite the fact that we certainly know that they existed and how the final result –the marketed model– looked like.

But what we do not know far exceeds those basic facts: who made them? How many of them were made? How many iterations did the idea go before settling on the final design? Why and how were those prototypes released into the wild?

From a historical point of view, their interest –dare I say– is limited. Sure they inform the creative process to reach the final model, but their intrinsic scarcity makes more of the anecdote than a reference in themselves. The model is the story, the prototype is the footnote.

But that singularity is what attracts the attention of collectors and what brings prices up on those rare occasions those pens show up in the market.

The following two pens are prototypes of what later became the balance Custom models in the Pilot catalog (Custom 67, 74, 742, etc.). The man behind them, commissioned by Pilot, was lathe master Sakai Eisuke (酒井栄助) in early 1980s.

Two prototypes by Sakai Eisuke for Pilot.

Mr. Sakai looked back in the Pilot catalog to recreate the balance models of the brand in the early 1930s. As a result, these pens are made of ebonite, coated with urushi, and implement the very traditional Japanese eyedropper filling system.

Both of them have their bodies engraved in the same way, copying the style of those old Pilots: “PILOT” / THE PILOT PEN (P logo) MFG. CO. LTD. / MADE IN JAPAN. Note, though, that the P logo, P encircled by a lifebuoy, was adopted in 1938 and that those models from the early 1930s used a similar logo but with an N, Namiki, instead of the P.

The most significant difference between those two pens, aside of the size, lies on the nibs.

The smaller pen sports a size 3 nib with a very old fashioned engraving: WARRANTED / 14 K / PILOT / 3. It is not dated, and it is matched with a very generous ebonite feed.

The size 3 nib with the very generous feed made of ebonite.

The bigger unit has a size 10 nib similar to those present on models like the Custom 742. However, on this case the nib is not numbered as 10. Is is dated September 1983. The feed is also a contemporary unit made of plastic with the interesting detail of a shortened tail to accommodate the seal of the Japanese eyedropper system.

The size 10 nib made September 1983.

These are the dimensions of the pen together with those of a Custom 74:

	.Size 3.	.Size 10.	.Custom. 74
Length closed (mm)	137	146	143
Length open (mm)	120	124	125.5
Length posted (mm)	166	176	160
Max diameter (mm)	13.8	15.0	14.5
Weight, dry (g)	13.9	18.6	21.3
Ink deposit (ml)	2.6	2.7	1.0 (*)

(*) Capacity of converter CON-70. Other options are available.

From front to back, Sakai's #3, Sakai's #10, and Custom 74.

All in all, Sakai Eisuke combined his expertise in Japanese eyedroppers with the old aesthetics of the 1930s, balance Pilot pens. And at the end, from the prototype to the final model, only the basic shape was preserved.

One could argue, then, that the prototype was not representative of the final model, but this fact only adds appeal to these footnotes to the basic story.

Pilot Custom 748 – Pilot (Thai) Black

Bruno Taut
March 14th, 2024
etiquetas: Sakai Eisuke, Pilot