You can download or request a manual via mail from the S&W web site
Try egunparts or S&W
S&W only made the Model 57 and 657.
You will have to call S&W to find out.
I have a mod 41 ser.# 137xxx and it was made in 1970. it has the cocking indicator. You can call S&W and they will tell you the date of manufacture and it,s free.
You will have to call S&W, goes beyond published data.
The Marlin 9mm Camp Carbine will accepts the S&W Mod 59 Magazine . Joe-R
Best left to a gunsmith if you don't have a manual. Go to the S&W website and you can download or order one for free
I can't find any reference to a Stevens mod 320 however if it is similar to their mod 124 (12 ga, bolt action, 3 shot box magazine, 1950's manufacture) then you will not find an extended magazine for this gun. Stevens never made a 5 shot magazine for this gun and no after market companies would either. A 12 ga pump with extended tube magazine is a better solution.
Call S&W and they will tell you when it left the factory. It could have been made anywhere from a week to a year before.
its a game, just called "Garry's mod"
Inside the crane area