You cannot the serial number is required.
According to Remington, it was made in 1913.
1913
1916 - pre-date coding.
They have date code stamps on the barrel which can be looked up on the manufacture date link on the Remington Society of America. --- Update: It's important to note that the barrel on the shotgun MAY not be the barrel that was originally on the shotgun at purchase. Check the serial number with Remington.
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.
with the L prefix to the serial number,this would indicate that your model 1100 Remington shotgun was made in 1991.
Lookup date code on Remington Society of America here: http://remingtonsociety.com/rsa/questions/barrelcodes
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.
They are date code stamped, see related links for information on the Remington Society of America.
1928, it will be date code stamped on the barrel. See related links for information on the Remington Society of America.