I came upon and found interesting and thorough, Dr. Richard S. Appel's three part series on the
Washington quarter type B reverse last year. Finding it quite informative and complete I started looking for the best examples of each, 1956 through 1964.
Some very nice examples were not easy to come by and took almost a year to obtain.
Finally complete, here is my 9 coin set of the reverse type B. All are attributed and MS 65 or 66. The 1956 was the only one I could not locate attributed AND graded by a major
TPG. However, this 1956 MS 65 is a confirmed reverse type B, FS-901.


Here is a link to Dr. Appel's complete review and analysis of the
Washington quarter reverse type B. It has 3 parts and is a very interesting read.
https://coinweek.com/expert-columns...1964-part-1/