Sheaffer PFM's

I collect vintage and modern pens and have over 100 at the last count. My collection comprises Conway Stewart, Pelikan, Onoto, Watermans, Esterbrook, Bexley, Sheaffer, Parker, Wahl Eversharp, Mabbie Todd, Conklin and Monblanc. I use them all at one time or another.
 
I have a similar amount, I don't have any Onoto, Wahl Eversharp, Mabie Todd or Conklin though.

I do have examples of Pelikan, Yard O Led, Visconti, Aurora, Stipula, Delta & Cross.
 
I was born in the small town where this pen was invented and later on knew people who worked at the factory. It closed down for good a decade or so ago.