Need the serial number to answer.
12 guage? 1908
Look at the manufactured date link on the Remington Society of America for details.
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.