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410 bores), while the 840 series was chambered for the larger and more powerful 3" shot shells. A new owner of a Cooey Model 84 should get the chamber measured for the proper size of shot shell by a professional gunsmith since most of the older 84 series guns were chambered for 2 3/4" shot shells (except. The Model 84 was chambered in most common shotgun shells including 12 gauge, 16 gauge, 20 gauge, 28 gauge, and. Dating the serial numbers remains a challenge for collectors of Cooey firearms.
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Some have suggested that Cooey did not use serial numbers, but many pre-1961 Model 84s are stamped with serial numbers on the receiver, barrel (under the fore stock) and under the butt plate/shoulder stock. Written records of serial numbers are not generally available. Cooey Machine & Arms Company" on the right side of the action, while guns made after the Winchester's acquisition of Cooey are stamped "Winchester-Western (Canada) Limited." on the right side of the receiver. Model 84's manufactured before 1961 are stamped "H. Cooey Machine & Arms Company in Cobourg, Ontario, Canada. The Model 84 was the first shotgun designed and manufactured by the H. Today, the 84/840 is considered a collector's item to those who collect Canadian-made firearms. The shotgun was sold as the Model 84 until 1967 when, following acquisition by Winchester, it was sold as the Model 840 until production ended in 1979. Cooey Machine & Arms Company in Cobourg, Ontario, Canada (later acquired by the Winchester Arms Company). The Cooey 84 is a shotgun manufactured by the H.
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