Dating my remington 1100
Confounding the issue a bit may be the fact that Remington Arms stamps their final inspector stamps and assembly (product) codes in the immediate area of the date codes.
So it may be difficult at times to determine exactly what is what.
Remington resumed stamping the date code on the barrel on 10/1/01.
Only Remington can give an owner a DOM for a gun from this era, that carries no date code - via the gun's serial number.
With that in mind, and considering a lot of variables.
If a specific Remington firearm has a serial number, Remington Customer Service is always the first source which should be checked for date of manufacture as they would be the definitive source.
REMINGTON MANUFACTURING DATE CODE stamped on LH top rear of barrel, 2 or 3 digit, (month first, year after) these will normally only be the last letters as seen below, The factory says all barrels are date code stamped, well I have found some that are not, or if they are, are so erratic stamping that trying to decipher them is impossible. Both were taken off Remington 760s, with the one on the left, a 30-06 that I bought new October 10, 1954. The one on the right again a 30-06, but with a shorter barrel that I made into a knock around quad rifle with pivot mounts.
(*) On 8/9/99, they stopped stamping the barrels with the date code.
With the hundreds of different Remington models produced over the past 200 years, it can sometimes be difficult to determine the age of your firearm.So, if the barrel is not original to the specific firearm in question the date code may be meaningless.Also if there is a custom or aftermarket barrel installed it will not have these factory codes.Also some letters were left out if there was a chance of misidentifying a date.
Also they jockeyed year letters to a new starting point in 1980.Remington never (*) used serial numbers to identify the date of manufacture of it's firearms, they however stamped a date code (spelled out below) by the first letter meaning the month and the last letter the year of manufacture. On the RH side of the barrel will be a Magnaflux, Remington proof & a test mark If a gun is returned to the factory as a fire damaged, or blown up firearm, the factory will stamp it as a prefix to their date code with a #4 on the barrel and return it un-repaired.BARREL DATE CODE - stamped exposed on LH top rear of barrel after 1920 the following will only be stamped where applicable #2 Part order barrel (not originally assembled to firearm) #3 Service section received #4 Return as received #5 Employee sale R. Then if the gun is ever subsequently returned to a warranty center or the factory by ANYONE, they will refuse to work on it as an unsafe firearm.Overview Since serial numbers were not required until 1968, your firearm may not have a serial number.