Here is a very interesting piece on loan to the NH Historical Society museum in Concord, New Hampshire. I can't vouch in any way for the authenticity of this item or the year it was allegedly invented, except to say that if it is true, there is at least 1 man who seems to have beat Samuel Colt by a year. I think at one time or another, we have all heard tales that Colt might not really be the builder of the first revolver, but regardless he was the first person to patent one in 1836.
I can only make a few guesses. It looks about .32 or .33 caliber, and I think a 7 shot cylinder. Though I studied the action a bit, I am not sure how this gun cocks or works. It is kind of dim in the museum. There is no flash photography allowed, so these are handheld with a good point and shoot, using existing light, which is why they look a bit grainy (actually it is "noise" to use the correct digital terminology) The staff on duty when I took these were not familiar with firearms in any way, and had no additional details to offer.
I blocked the name of the owner/lender of this revolver for obvious reasons, but otherwise the placard reads:
Prototype for a revolver, ca. 1835
Invented by Harmon Fife (1800-1845) North Pembroke, New Hampshire
Maple, steel
Loaned by &&&&&&&&&&&
This hand-made model documents the inventiveness of one New Hampshire farmer. As far as can be determined, Fire never attempted to secure a patent on his invention, although, according to family history, Fife’s revolver predates Samuel Colt’s 1836 patent.
The epitaph on Fife’s tombstone reads:
Here lies the man
Never beat by a plan
Straight was his aim,
And sure of his game,
Never had a lover,
But invented the revolver