When was it made enfield revolver esc 321?

Answer 1

Between 1880 and 1955 is the best answer available without a hands-on appraisal. Production records of the Enfield revolvers are not available, the serial numbers weren't indicative of a production date. Perhaps with a hands on appraisal, markings on the firearm could be found which would help narrow down the date of manufacture.The manufacturer's name could also help - while most of these were made by the Royal Small Arms Factories, production was outsourced to other companies during periods of wartime manufacture.