"Each...CHARLIN will be defined by a letter, and in the series, depending on the finish by a symbol of identification. Each model and thus each letter is associated with one of these 6 symbols: a rabbit, a tiger head, a swallow, a hare, a pigeon and a star.
Depending on the degree of finish, the number of these icons vary from 1 to 8."
I cut and pasted(stole?)the above. It means that the more critters stamped on the barrel flats the higher the grade.

Peter A.