1914
RW is Remington Works, not part of the serial no. 1912.
1914
Serial numbers by year for the 870 Remington Model.
around 1912
it is 56 Remington rifle model
What model by serial? No
Are you sure it's an auto and not a pump action, it sounds like the predecessor to the Remington Model 10.
Action size.
Your remington model 700 was made in 1982 with the letter C prefix to the serial number.
Post a serial or call Remington.
Your Remington model of 1917 rifle was made in November of 1918,with the serial number that you have provided.
http://en.wikipedia.org/wiki/Marlin_Model_336