Check date code details link - Remington Society of America
Serial 718943w
Do a search on barrel codes, I believe that will give you an answer
In 1950 Remington introduced fifteen versions of the Model 870 shotgun, in 12, 16 and 20 gauges.
From the date code stamped on the barrel. Look for the manufactured date link on the Remington Society of America for details.
Check the Remington Society of America, date barrel codes and location. http://remingtonsociety.com/rsa/questions/barrelcodes
See related link.
http://remingtonsociety.com/rsa/questions/barrelcodes
go to Remington web site they can help you as they did with my 870 wingmaster
Go to the Remington Society of America and click the Manufactured link, it has the location and barrel codes for month/year of manufacture.
Check this table for the answer: http://www.remingtonsociety.com/rsa/questions/barrelcodes
Check this table for the answer: http://www.remingtonsociety.com/rsa/questions/barrelcodes
Remington Society barrel code lookup: http://remingtonsociety.com/rsa/questions/barrelcodes