Talking about hard to spot the reverse differences on 1965 - 1970!! So many of these are worn and look doubled (fat S's).. lol.. But check out the differences in the reverse on these two 1966 quarters.. The last leaf on the left by the arrow.. The N in UNUM and the Eagle 's beak.. Is the 1966 with the taller well defined leaf a type B reverse?? Thanks
RDV-004 AND RDV-005 are the known reverse types for 1966. I can't see anything other than a well circulated quarter but you can check the following presentation on the subject by James Wiles https://conecaonline.org/washington-quarter-reverse-design-varieties-examined/