The year of manufacture for R = 1957-1958. (source:) http://armscollectors.com/sn/marlinlookup.php
subtract first two numbers from 100 that's the year of manufacture. should be 1981
1912 to 1936
1952
77-78 or so
The year of manufacture for F = 1949. Started chambering for the .35 Rem. Cartridge Carrier rocker blued.
The AA serial number indicates a 1965 year of manufacture.
The year of manufacture for F = 1949. Started chambering for the .35 Rem. Cartridge Carrier rocker blued.
your marlin model 336A was made by marlin in 1950.
You might try the date system on Remington's web site here... http://www.remingtonsociety.com/questions/BLACKPOWDERX.htm ....and possibly find your answer.
Your Marlin model 336CS(Carbine Sporter)was made in the year 1987.
The Remington Model 8 was manufactured from 1906 until 1936 with around 60,000 being made in .25 Rem., .30 Rem., .32 Rem., or .35 Rem. caliber. Value will vary upon condition and examination.