1870 is a continuation of the first line Marlin Firearms Company Est. 1870 the model of the gun is 336 and is .35cal i believe they started making them in that cal in 1950's
Your Marlin model 336 was made in the year 1972.The current value will be between 250-350 dollars,depending on overall condition of the wood and metal,and a good bore.
1964
It is a Marlin 336 carbine as made for Sears.
The R prefix was assigned to the years,1957-1958 by marlin.Therefore your Marlin model 336 was made during this time span.
The AA prefix to your serial number dates your marlin model 336 RC(regular carbine) to the year 1965.
1961 (August)-1962.
71
The AA serial number indicates a 1965 year of manufacture.
http://oldguns.net/sn_php/marlinlookup.php P...........1957
1981
first 2 numbers are date code 23 stands for 1977
The 2 letters AD ahead of the serial number indicate that your Marlin model 336RC(regular Carbine) was made in the year 1968.