1933-1939
They were made from 1923 till 1940
The RH 50 was a Boy Scout knife made from 1925-1940 with several variations.
1970 to 2006 maybe 2005
Your Remington model 1903 was made in the year 1941,with the serial number that you have provided.
It was in production from 1931 to 1949, when it was superseded by the Remington 870.
1959-1962
your Remington model 512 was made from 1940-1962,with a total production of 395,000 guns.
With the serial number that you have supplied,your Remington model 1903 rifle was made in the year 1941.
1930'S
1912
Check the manufactured date link on the Remington Society of America for details.