"This company was located in Rochester NY. They were in business from 1909 – 1943 according to Rainwater’s AMERICAN JEWELRY MAUNFACUTURES book."
I'm originally from Rochester, NY so I will be very interested to find out about your particular fob... this company also made frat pins and the like... I'll keep looking.
And... a quick search of e-bay & google shows they made watch fobs that are now selling for $5.00 - $30.00... and a few depending on the specific company or type worth up to $80.00 bucks or so (presedential items, Indian Motorcycles... etc.).
So my GUESS is your's might be worth a little bit... 15.00 bucks to the right person? Some research on your part will help place the value for this company which still exists thinks I.