Nib: Fine 14k Gold
1939 Geometric Duofolds.
Parker Red & Black Button filler, black blind caps. No tassie girdle. g/f clip / Visiometer ink vue with button filler. Made in USA Stamped “Parker Duofold” on barrel. Capped 12.3 mm
In the 1941 catalogue the Duofolds transparent features were referred to as Full Television ink supply, while the button fillers had the small, transparent window at the end of the section allowing the user to determine not how much ink the pen held, but at least gave a hint when it was close to empty, this was referred to as the Visiometer ink supply. This was a feature adopted from the 1939 Geometric Duofolds