My grandpa recently gave me a Winchester Model 290 he bought ages ago. Out of sheer curiosity, I’ve been trying to find more info on it, hopefully find out when it was made (Serial is in the 40XXXX range). Unfortunately, both Winchester and Cody hadn’t even heard of that model. The most I’ve been able to find are a few pictures of print ads from the 1960s.

Does anyone here have more information on the model 290, or other places I could look?