Model 74 Winchester .22 rifle

[HisSoldier]

Rifle serial number is 18170**, we are looking for the date of manufacture and I can't find a website with the information. My friend bought this autoloading rifle for a pittance in a package deal, nice shape but far from minty.
I know these were first manufactured in 1939.

 

[Scorch]

That dates the rifle to 1948.

 

[HisSoldier]

Thanks!