Are you looking to this firearm or simply identify its specific year for collection purposes? SERIALIZATION - NRA Museums:
Locating a definitive serial number lookup for the Cooey Model 840 Cooey Model 840 Serial Number Lookup
Let’s say your rifle has serial number on the left receiver flat, with “Cooey Model 840” and a small “Winchester” marking. That suggests 1963–1964 production , likely for the U.S. export market. Without factory letters, you won’t get an exact day or month—but that’s as close as anyone can get. Are you looking to this firearm or simply