Fieldmaster 572 barrel code O M Y

[600RemGuy]

Go here:

http://www.remingtonsociety.com/rsa/que ... arrelcodes

Under where it says "B - L - A - C - K - P - O - W - D - E - R - X", click this:

"Barrel Code Location Diagram
Click this ^
Don't try to read this ->
It's just a thumb image"

This explains the barrel markings

Yours way made in july, 1965 or 1992. There is a vast difference between the different years so you should be able to figure out the decade. No serial number, 1965!

[600RemGuy]

The "Y" in your case is the mark of the person who assembled the rifle. This is an internal factory code givin to the person. So when all is said and done and if the rifle has NOT been factory repaired, your rifle shows the final inspection mark (anchor), month, year, then assembler.