As Looky noted, you can date it from the first letter of the serial number. Is the receiver top "waffled" or smooth matte and is it drilled for a scope base? If it has a pre '56 DOM and it is D&T'd it was likely done after market, Marlin didn't make D&T standard on the 336 til '56. The "waffle" top rifles have a following that might pay a bit of a premium. That said, I think it looks like a very nice, well treated example of what is probably an early to mid '50's 336RC with Ballard not Microgroove rifling. The wood is very nice, great figuring on the forearm. None of the screw heads looks to be gibbled and the blue is pretty good except for normal carry wear. IMO the 32 Win Spl is a great deer/bear Ontario woods/bush calibre. For me, it and the 35Rem have a certain old school cache.