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 336 was produced in 1976.
your serial number indicates that your Marlin model 336 rifle was made in the year 1984.
Your marlin model 336 was produced in 1976.
Your serial number indicates that your Marlin model 336 was made in the year 1971.
Your Marlin model 336 was made in the year 1981,with the serial number that you have provided.
Your serial number indicates that your Marlin model 336 rifle was made in the year 1971.
Your serial number indicates that your Marlin model 336 rifle was made in the year 1980.
The W prefix to your serial number dates your marlin model 336 to 1963.
Your serial number indicates that your Marlin model 336 was made in the year 1971.
1961. There is a serial number tutorial on wikipedia under "Marlin Model 336"
Your serial number indicates that your Marlin model 336 rifle was made in the year 1972.
Your serial number indicates that your Marlin model 336 rifle was made in the year 1970.