yes, certainly a name to excite most pen enthusiasts ...................... but unfortunately it isn't quite that simple - the word Duofold encompasses a substantial range of mostly older pens which started life c. 1921 and went on through many models/variations. This pen was the life blood of Parker, and changed the pen industry for ever, almost all examples being b.f. types. Superceded in the late 1930s by the Vacumatic, which used a different filling system, and this in turn was overtaken by the P51 in it's many guises.
The Duofold name was used in the U.K. in the 1950 - 60 period for a quite different pen, then brought out of retirement in the 1990s for limited editions and customized pens - based on the original States examples - for those with very deep pockets.
So, which one do you want
Edited by PaulS, 26 July 2017 - 21:53.