Look closely at the metal surfaces of the firearm. The most common locations for a post-1968 Cooey serial number are: The left or right side of the receiver (frame). The underside of the receiver, near the trigger guard.
Winchester closed the Cobourg facility in 1979, ending production of the Model 840. 3. How to Find the Serial Number on a Cooey 840 Cooey Model 840 Serial Number Lookup
He turned the firearm over, looking for the maker’s mark. On the receiver, faint but legible: And beneath it, the model number: 840. Look closely at the metal surfaces of the firearm
"Because," Elias said, opening the database tab one last time to screenshot the serial number lookup for his personal file, "it feels like it still has some work to do." Winchester closed the Cobourg facility in 1979, ending
"It's not just a shop gun," Elias said. "This wasn't sold in a hardware store. It was a government contract shotgun. This was likely issued to a game warden or a surveyor in Northern Manitoba. That explains the smooth action—it wasn't used by a weekend hunter; it was maintained by a professional who needed it to work at forty below zero."