1876....according to the numbers in The Greener Story Book....you should send all info you can including pictures by email to Graham Greener who is great on giving you the history of the gun , including who did the engraving and other information. If the gun was ordered here in the US though Abercrombie and Fitch Bob Beach of Griffin & Howe might have further history . The Griffin and Howe web site provides a prompt to let you know , by make and serial number , if they have the info....during that period Henry Squires was a Greener importer out of NY....but Webley bought the Company in 1965 and repurchased by Greener in 1985.... Greener should have original info on the Gun, thereafter unless A&F has something your trail may stop.