Cooey Model 840 Serial Number Lookup Page

Read the text stamped onto the side of the barrel. The wording reveals the factory timeline:

H. W. Cooey manufactured firearms in Cobourg, Ontario. During this time, Canadian firearms laws did not mandate serial numbers on rimfire rifles or utility shotguns. Consequently, early Cooey firearms rarely carried a serial number. Cooey Model 840 Serial Number Lookup

Some Cooey-branded firearms made before 1968 were not legally required to have serial numbers, though many Model 840s (produced post-1967) do feature them. Winchester Collector Dating Your Model 840 Read the text stamped onto the side of the barrel

After 1968, Winchester complied with the new regulations by introducing serial numbers to the Cooey line. However, Winchester's record-keeping for the Cooey plant in Cobourg was not as meticulously preserved as their domestic New Haven records. While some ledger fragments exist, there is no public, centralized digital database for Cooey Model 840 serial numbers. Cooey manufactured firearms in Cobourg, Ontario