u/Eschatonisnear

Hi everyone!

Recently acquired this very interesting Deka Fountain Pen. Body is shaped like a Sheaffer Targa and marked 18KGP. But whats very interesting is the nib. At forst glance there's the main nib thats an F, however there is a switch on the section that when pushed forward slides a hidden Medium nib from under the F Nib. Both Nibs are really smooth writers too! If anyone has more info, I'd really appreciate it! Thanks!