Cooey/ Winchester 600 grooved reciever

[x westie]

I recently purchased a Winchester/ Cooey Model 600, it has a grooved receiver for a scope, it has no serial number, i am curious about the production date, would this be a late 1960's production, or early 1970's, thanks for all your replies

 

[gunsaholic]

The model 600 came out in 1967 and the early ones were not grooved on the receiver. Some had side mount holes from the factory for a weaver side mount. I don't know for sure what year the grooved receiver came out but I would guess early to mid 70's.

 

[Claven2]

LOTS of gunsmiths with mills added scope grooves to cooeys of all vintages. I've done some myself. It's a much better system than the factory side mount.