This Merwin Army revolver exemplifies the determination of the company to offer a revolver to compete with all the other major Frontier revolvers of the time. Originally introduced with the 1st Model Army, it wanted a “Trade Mark” caliber, so it was chambered for the .44Merwin Hulbert cartridge. It would continue to appear sporadically in later years, but a marketing decision was made. It was early in production changed to .44WCF ( 44/40) caliber. Why? it would be more competitive with Colt, as Winchester also used this caliber. In reality in the mercantile stores on the frontier carried the most popular items in ammunition. HOWEVER, for a blink of an eye, before 44/40 they had an idea. S&W was selling a lot of revolvers, domestically and foreign. They thought why not, so they chambered LESS than 100 revolvers in 44 Russian Caliber. This idea quickly reverted to 44/40 , and the .44 Russian for Merwin was finished. It is estimated that only about 100+ or – were manufactured. I have dealt in Merwins for many years and have only seen a few others Russian Models and they were the Pocket Army Model. Despite the condition Serial No.902X, matching assembly numbers 6851, is a VERY RARE model , and if you like Merwin revolvers , worthy of a collection. REGARDING CONDITION: All parts are the original parts from the factory, including the Lanyard Ring. The original Nickel finish has seen long term use and only about 20% is still present. the balance of the revolvers in a mix of gray patina. I might add, untouched original patina. MECHANICS: The Merwin has correct functioning working mechanics, EXCEPT for the extraction process. It cocks, locks and releases to fire. Extraction of cartridges: somewhere in time, the collar was filed off, so the cylinder does not follow the barrel when twisted and pulled. I think it was too difficult for the 19th century owner, so he made it more familiar an action to other revolvers.