The Remington Model 11A, a semi-automatic shotgun, was produced from 1911 until around 1947. The serial numbers for these shotguns can vary, but specific serial number information is often used to determine the manufacturing date. For precise dating, consulting a Remington serial number database or a firearms expert would be advisable.
1919
Early 1913
Remington Model 550-1 does not have serial numbers.
1955.
1968
1950
1981
your marlin model 336A was made by marlin in 1950.
The G prefix to your serial number shows that it is a model 70 Winchester rifle.It should say this on the barrel of your rifle.
It describes the model of the firearm.
1952
Your Marlin model 336CS(Carbine Sporter)was made in the year 1987.