The receiver was made in 1979 but may NOT have been assembled as a shotgun during that time frame. It could have been assembled in 1980. Value, as always, would depend on the current condition of the shotgun. Best bet would be to take it to a local gunshow (in an appropriate case) and see what the folks who rent tables will offer you for it. Most likely you could add $50.00 to $75.00 from what's offered.
Need the serial number to answer.
Manufactured 1906
Manufactured 1915
You cannot the serial number is required.
Look at the manufactured date link on the Remington Society of America for details.
12 guage? 1908
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.
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.
Some, but it's a heck of a lot easier to just look up the date code stamped on the barrel. Manufactured date link on the Remington Society of America for details.
your Remington model 1894 shotgun was made in 1899.
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.