I was given a Remington 572 Fieldmaster .22 slide action smooth bore rifle from my grandpa. I have never seen or heard of one before so I have looked them up online to find out more. One thing I have found with my gun is the letters on the barrel don't seem to match up with anything Remington has for looking up the manufacture date. I know they were made from 1955-88 and assume this is an early model due to most of the guns my grandpa owns. Can someone help me with this on the forum? The letters start with a symbol that resembles a ship anchor followed by XH W. If no answers known on here, then does anyone know of a good resource to find out more about this gun? Great shape, pretty gun. Killed one grouse at about 5 yds, but wouldn't try anything over 20yds...mostly a fun target shooter. Thank you for any advice!