I own two Remington 'long guns' and they are:
1. .35 Remington Gamemaster 141F, SN: 60483; Date Code: PTT and,
2. 12 Ga. Remington Sportsman Autoloader Model 58, SN: 163,574V; Date Code: AA. It is engraved on both sides of the receiver but there is no grade code anywhere that I can see.
I am looking forward to sharing and obtaining information regarding these firearms.
Best Regards,
Rex Henderson