The serial number prefix letter of G indicates that your Marlin model 336SC(sporting carbine) was made in the year 1950.
The year of manufacture for F = 1949. Started chambering for the .35 Rem. Cartridge Carrier rocker blued.
1955.
71
The R prefix was assigned to the years,1957-1958 by marlin.Therefore your Marlin model 336 was made during this time span.
your marlin model 336A was made by marlin in 1950.
The year of manufacture for F = 1949. Started chambering for the .35 Rem. Cartridge Carrier rocker blued.
Your Marlin model 336CS(Carbine Sporter)was made in the year 1987.
Yes
1950
These are currently selling in the range of 275-350 dollars.
1981
1964