The included factory letter states the revolver was shipped to Hibbard, Spencer, Bartlett & Co. of Chicago, Illinois, on October 31, 1907 with a 7 1/2 inch barrel in .38-40 caliber, blue finish, and type of stocks not listed. This was a two gun shipment. .38-40 WCF was one of those perfect cartridges for the Western frontier. As explained by Colt SAA expert and author David Brown, "This cartridge, as used in the Colt Single Action, made the revolver a perfect companion-piece for the Winchester .38-40 W.C.F. rifle--just as the .44-40 revolver was a mate for the .44-40 rifle. This bottle-neck .38-40 cartridge made one of the harder-hitting of the handgun loads, and hand-loaders today know that it can be reloaded to near the modern Magnum pressures" ("The 36 Calibers of the Colt Single Action Army," page 150). The barrel has the one-line Hartford address on top and "38 W.C.F." on the left side. The frame has the two-line patent date marking followed by an encircled Rampant Colt. Matching serial numbers appear on the frame, trigger guard, back strap, and both grip panels (faint). Provenance: The Hank Williams Jr. Collection; The TTT Collection