Jack, that gun is somewhat rare. I see the serial numbers indicating a few hundred made. Whitmore was connected with American Arms, but he was connected with other companies before and maybe after. He had a dozen or so patent, relating to guns made with or by Tonks, Remington, Chicago Arms or similar, and American Arms Co. The one you have was made in at least three, maybe more, grades and was well finished. That model does have some eye similarities to a higher grade N R Davis with the square crossbolt, but that may be just a visual thing and not related to the mechanisms.
