Cooey Model 840 Serial Number Lookup Hot! May 2026

The Cooey Model 840 is a staple of Canadian firearms history, representing a break-action, single-shot shotgun built for reliability and affordability. Produced from 1967 to 1979 under Winchester-Western (Canada) Limited after they acquired the H.W. Cooey Machine & Arms Company, the 840 is the successor to the earlier Model 84.

Cooey Model 840

Dating a is notoriously difficult because no official factory production logs survived the closure of the Cobourg, Ontario plant in 1979. However, you can narrow down its age by examining specific physical markings and manufacturer stamps. The Problem with Serial Number Lookups Cooey Model 840 Serial Number Lookup

1. Standard Model 840: Plain Jane utility model.
2. Cooey Model 840 "Single Shot" vs "Magazine": While the 840 is generally single-shot, some owners confuse it with the Model 64/840 variants that accepted magazines (rare for the 840 shotgun variant). Most 840s are strictly single-shot, fed by hand into the ejection port.
3. Winchester-branded Models: Later in production (1970s), some were branded under the Winchester name (e.g., the Winchester 370 is essentially a Cooey 840 design). If your gun says "Winchester" but was made in Canada, it falls into the late-production serial range.

Elias rubbed his temples. The internet was a labyrinth. He needed a concrete reference. He pulled a heavy, binder-clipped book from the shelf behind him: The Collector's Guide to Canadian Arms. The Cooey Model 840 is a staple of