Prototype 27 - Aluminum grid

This one feels so light that it feel like it is made out of aluminum though it may be silverplated.  The weight of the FP without section and nib, and BP without refill are as follows:

in grams

Cap

Barrel

Total

FP

7.2 g

6.9 g

14.4 g

BP

7.4

6.2

13.6

It is marked as being made in France and has a curious date code of "YCS" which dates it to either 1980 or 1990 though I don't know what CS means..

The grid pattern is similar to the normal 75 grid but the grooves are not filled with any material.  The tassies are goldplated and dished with the circular disc in place.

To my knowledge this pen was never released commercially.

Update of July 23, 2005

Here is another version that doesn't have the silverplating which gives it a dull appearance.

This one is much older based on the flat tassies.  The weight of the cap is 4.7 grams and the barrel is 5.1 grams for a combined total of 9.8 grams!  This is the third lightest 75 FP that I have seen to date; the lightest so far is the titanium 75 prototype with flat tassies.

The real surprise is when  you open the pen revealing the nib and the zero reference metal threaded section as shown by the shiny band where the section screws into the barrel.  This section is more evidence this is a very early prototype.  My guess is that this pen was made in the late 1960s.

Wow, what a mean left hook on that nib!!  If it was any wider, you would be tempted to use this pen as an ice scraper.  ;-)