What does marlin 336 r.c. 30-30 mean and what year is it F 30041 sn?

First lets start with the 336RC.This stands for the marlin model number(336),The letters RC stand for the Words(Regular Carbine).The numbers 30-30 stand for the caliber of your marlin rifle,30caliber,and the second stood for 30grains of black powder.This was how the original load back in 1894 was measured.The F prefix to your marlin model 336 regular carbine indicates that it was made in the year 1949.I hope this helps.