So a potentially interesting thing regarding this gun just cropped up due to another post. A gunsmith named Joe Lamping was mentioned. When I did a bit of googling I came up with this old auction:
** Pre war Colt Single Action Army Revolver | Cowan's Auction House: The Midwest's Most Trusted Auction House / Antiques / Fine Art / Art Appraisals
The hammer on this gun looks very, very, familiar
So if this Cowan's auction is correct about that hammer being the work of Joe Lamping, I'd say that the hammer on this gun at least was done by him. I can't imagine the short action job also wouldn't have been done by whoever did the hammer.
In any case, anyone have any information about Joe Lamping out of Cincinnati?