Check the date code on the Remington Society of America, details here:
http://remingtonsociety.com/rsa/questions/barrelcodes
Please check the link for the Manufacture Date codes details on the Remington Society of America.
1920
1943
A link to the manufacture date tables by serial can be found on the Remington Society of America on this page. http://www.remingtonsociety.com/rsa/questions/barrelcodes 1942
Need to check the barrel date code. Remington Society of America, Manufacture date link has all the details.
Remington Works - 1914 (late)
Serial? 1909 to 1938ish From 1921 on they are date code stamped on the barrel. Check the Manufactured Date page on the Remington Society of America.
late 1919
1912
1920
1912
1920