Letter grade Trap and Skeet model Remingtons come in the following grades.
A, metal untouched, wood upgraded a little over standard.
B, same metal, wood a bit better usually, but some TBs have absolutely GORGEOUS lumber, mostly from the 70s.
C, still plain metal, but wood ascends to very good levels, with some being exhibition grade.
D, 50% engraving on receiver,wood usually C grade or better.
No E grade.
F,Full engraving on receiver, some on barrel. Lumber superb.