Got an ID finally, Smith & Wesson Model 3, there were some made for the Russians. Finger rest is broken, barrel has been trimmed.
The Smith & Wesson Model 3 was a single action, cartridge-firing, top-break revolver produced by Smith & Wesson from 1870 to 1915, and again recently as a reproduction by Smith & Wesson themselves, Armi San Marco, and Uberti.
It was produced in several variations and sub-variations, including both the aforementioned "Russian Model", so named because it was supplied to military of Tsarist Russia (20,000 No. 3's were ordered in .44 caliber by the Russian Army in 1871),and the "Schofield" model, named after Major George W. Schofield,who made his own modifications to the Model 3 to meet his perceptions of the Cavalry's needs, which Smith & Wesson incorporated into an 1875 design they named after the Major, planning to obtain significant military contracts for the new revolver.
The S&W Model 3 was originally chambered for the .44 S&W Americanand .44 Russian cartridges, and typically did not have the cartridge information stamped on the gun (as is standard practice for most commercial firearms). Model 3 revolvers were also later produced in an assortment of calibres, including .44 Henry Rimfire, .44-40, .32-44, .38-44, and .45 Schofield.
Mie