The B reverses are only on 1956P-1964P quarters. The C reverse is only on the 1964D quarter. The B reverse pick up point is the space between the bottom of the E & S in the word STATES. Proof pieces have this reverse, but the buisness strike pieces with this proof reverse are the ones that are Rev B's. The 1964D Rev C has the reverse of the 1965 quarter with eagle tail feathers that are split.
Check your quarters...Regards, Harvey