3 Types Of Washington Quarter Reverses?

Well, I'm short in the 1956 category, but here's the rest of my population. I hope this helps other with rarity.

     56   57   58   59   60   61   62   63   64
BU    1    2    5    2    3    1    1    4    2
XF    1    3    0    2    1    1    3    5    2

Proof die reverses always have a space between the E and S in States at the top of the rev of quarters from 1956-thru 1964. Some of the circulating coins for this period got proof die reverses(ie:Type B rev). And apparently in 1964, they changed the rev die for the proofs(bold lined tail feathers) and some of the circulating coins got proof die reverses(ie:Type C rev)...so far only population known from the Denver mint.

That's fantastic Jaobler!