The last year of production for the Remington model nylon model 66 was 1990.These rifles were made from 1959-1990 with a total production of 1,050,336.
The Model 1100 has been made since 1963 and is still in Remington's catalog.
1972
With the serial number that you have provided,your Remington model of 1917 wa made in December of 1918.Your rifle was made at the end of production of these rifles for World War I.The last Remington serial number was 646,000.
Remington never made a model 67, model 76 (lever?), Winchester?
According to Remington's website, that model was made 1928-1933.
The Remington 241 (after the model 24) is browning design and look the same, the 241 was last made in 1949.
your Remington model 1894 shotgun was made in 1899.
All Remington model 870 shotguns were made in the Unites states.The Remington plant was located in Ilion,New York.
Remington's web site has a good model history section that will assist you.
With the serial number that you have supplied,your Remington model 1903 rifle was made in the year 1941.
The Remington was first made im 1946