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
1928, it will be date code stamped on the barrel. See related links for information on the Remington Society of America.
Check the date code on the barrel, the details and table lookup are on the Remington Society of America, manufactured date link.
To determine the age of your Remington Model 10 shotgun with the serial number U55191, you can refer to the Remington serial number reference charts, which indicate that the Model 10 was produced from 1908 to 1929. The "U" prefix suggests it was manufactured in the 1920s. For an exact year, you may need to consult a detailed Remington production database or a firearms expert.
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.
your Remington model 1894 shotgun was made in 1899.
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.