I've got one, it was my first rifle. Google cooey 22's, there are a lot of sites dedicated to the history of Cooey firearms. Dating it might be a problem, a large amount of their 22's weren't given serial numbers.
The one in the above video is from the fifties or sixties( plain walnut stock), they switched to birch in the late sixties and seventies and added pressed checkering with an embossed rabbit in the lower pistol grip panel.
They're a good little utility rifle, I could'nt even guess how many thousands of rounds of ammo I've put through mine. My nephew borrowed it..........for a couple of years now, I dont think I'll get it back lol
AB