So I've forgotten I'm getting old...
But on the 700's they started the A in 1970 or 1980 and the B 5 years later and continued up the alphabet HOWEVER the best way to tell is to look at the date code stamped on the barrel and that will give you month and year. The information for the barrel codes is on the Remington Society of America and I'll add this to the related links, check it for details.
your Remington rand was made in 1917.
Early 1911
Manufactured 1909
RW is Remington Works, not part of the serial no. 1912.
I just don't think that's a Remington made 1911A1 Serial no, are you sure it's no mixed parts? May be Colt, 1924................
1923, will be date code stamped see related links.
Get the date code stamp off the left side of the barrel and look it up on the manufactured link on the Remington Society of America.
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.
Serial no? If it's a 12 gauge I have a serial list up to 1930. But I don't understand if it's a Remington Barrel how it couldn't.
the serial number is not a remington rand serial number. it is a colt commercial 1911. you have a rem-rand slide on a colt frame. sorry.
Probably VERY early 1939. Best to check the barrel codes, look up the details on the manufacturing date on the Remington Society of America.
Your remington model 700 which has a letter A prefix to the serial number,indicates that it was made in 1980.