I will look for a scan of mine.....the notion that the stamps where on another later issue was confusing, because the other ones I have seen are on OBAKS, and someone thought Obaks where issued much later, but the F stamps coincide on Obaks with the time frame Mr. Fitzie was collecting as a teen....FScott grew up in the Minn area.... as a 15 year old boy, he collected baseball cards(around 1909)........There are a lot of the "F" stamps on the EPDG backs(one of which I own).....I have noticed the examples that I have seen to be very clean cards, and many are EPDG T206 .....EPDG were supposedly distributed in that region.....
Fitzie stamped most of his cards with the Italic F ....... his cards were later auctioned off after his demise by his daughter as far as I can remember.....It was rumored he had a few 1000 cards.....
I had mine SGC slabbed a few years ago.....(SGC will not note on the flip as far as I know, but maybe that will change in the future if more info comes to light)....I just wanted mine slabbed to note the year.....I believe if the it is iron clad proven, some A hole will pick up a stamp and try to make there own Fitzie
value is in the eye of the beholder, but i'm sure if it can be proven, they will be big cards, in the mean time $200-$300 cards for now......i'm just excited to have one.....to imagine the history behind them.....
anyway, to sum it up, not proven but all signs point to yes
totally probable and plausable