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Manufactured 1906
Manufactured 1915
12 guage? 1908
Look at the manufactured date link on the Remington Society of America for details.
Manufactured 1913
Check the date code on the barrel, the details and table lookup are on the Remington Society of America, manufactured date link.
1928, it will be date code stamped on the barrel. See related links for information on the Remington Society of America.
Can't be answered without a serial number.
your Remington model 1894 shotgun was made in 1899.
1929 if it has the original barrel it will be date code stamped. Check the manufactured date link on the Remington Society of America for details.
Only Remington can give you "modern" by serial no, it's not really tracked by collectors because it's date code stamped on the barrel. If you go to the Remington Society of America and click the manufactured date link there are the details.