was the Colt New Service in 38-40. Its reputation as a man killer as better even than the 45 Colt and professional gunmen loved it due to its tapered cartridge case. Just tap the ejector rod and the cases would fall free of the cylinder, significantly speeding up the reload. The one shown in the foreground was made in 1919. It was a "targeted" model in that the buyer asked Colt to carefully regulate the sights with full power loads. The frame was stamped with a "T" near the serial number. This gun was VERY accurate and shot to POA at 25 yards with full power loads. The gun in back is a Bowen custom Model 58, which was in my opinion a modern version of the NS.
These photos also give you an appreciation for how large the NS is in comparison to a modern fighting revolver.
Keith