When Winchester took over the Cobourg, Ontario plant, they eventually standardized the serial number system. If your Model 840 has a serial number, it usually follows one of two patterns: The Letter Prefix Format
Here’s the fascinating truth about the Cooey 840 serial number lookup:
The Model 840 has a unique place in firearms history, marking the transition from an independent Canadian company to an international brand. Cooey Model 840 Serial Number Lookup
Since you can't use a serial number to prove "rarity," value is based entirely on :
You might spot small, stamped symbols like a "C" with an arrow inside it (the Canadian broad arrow) or a Winchester proof mark (a "WP" inside an oval). These are quality control and military/government proof marks, not serial numbers. Is a Cooey Model 840 valuable? When Winchester took over the Cobourg, Ontario plant,
A stylized letter stamp indicates Winchester-Cooey factory inspection.
Late-model Cooey 840 shotguns often utilize specific letter prefixes that denote the decade or specific factory runs under Winchester management. Late-model Cooey 840 shotguns often utilize specific letter
The US Gun Control Act of 1968 forced manufacturers to use unique serial numbers for export markets. Canadian lines followed suit. Numbers often start with a letter prefix like "NW" or "CE". Serial numbers are cleanly roll-stamped onto the receiver.
If your gun is marked 840, it is confirmed between . If it is an 84, it is 1966 or older. Where to Find Identifying Numbers (If Any)
If your Cooey Model 840 lacks a serial number, it does not mean it is a fake or that the number was illegally removed. It simply means the gun was manufactured during an era when serial numbers were optional. Dating a Cooey Model 840 Without a Serial Number