Often featured walnut stocks and steel receivers; chambered for 2 3/4" shells (except .410).
Because the Model 840 has a specific production window, you can determine its age based on the company's ownership history. Production Years Key Identifying Features Model 84 1948 – 1967 Cooey Model 840 Serial Number Lookup
, indicating it was made after Winchester acquired Cooey in 1961. Can Anyone Date Cooey Shotguns - Year of Mfg. Often featured walnut stocks and steel receivers; chambered
: Indicates production before 1961, when the company was independent. Since the 840 wasn't introduced until the late 60s, you will rarely see this on an 840 unless it was a very early transition piece. "Winchester-Western (Canada) Limited" : This is the most common marking for the Can Anyone Date Cooey Shotguns - Year of Mfg
serial number lookup can be challenging because the H.W. Cooey Machine & Arms Company did not maintain consistent, publicly available production records. However, by examining the physical markings and identifying key features, you can narrow down the manufacturing date of your shotgun.
If your Model 840 has a serial number, it is typically found in one of these three locations: Stamped on the side or bottom of the frame.
Introduced as a more economical version; often used birch or maple stocks and 3" chambers.