So, I'm trying to get a complete list of these Reverse Types and what years they were made. As I understand it, The Type B reverse was a proof reverse that was first used in 1936 and used for all proof Washington Quarters from 1936-64...and then used again from 1968-1972 on proofs. The Type C was a business strike reverse that was modified for use starting in 1965 with the clad coinage. The Type M was a short lived proof reverse used on some of the 1968-S proofs (according to what I have read, approximately 75%). However, all of these types were used in limited quantities for business strike coinage. I have attempted to compile a list of when they were used and I would appreciate any feedback as to any errors I have made. The 32-98 Washington series is my favorite modern series and I am trying to learn some of the details of the series. So, based on what I have read, the Type B Reverse was used on some of the following business strike issues: 1956 1957 1958 1959 1960 1961 1962 1963 1964 1969-D 1970-D 1971-D 1972-D In addition to that, roughly only 25% of the 1968-S Proofs feature the Type B reverse. So, based on what I have read, the Type C Reverse (designed for clad only coinage) was used on some of the following silver business strike issues: 1964-D Finally, the Type M Reverse was used on the following issues. The percentages listed I found on the collectors.com forum and indicate the believed percentage of production the Type M accounted for. Apparently, most of the 1970-D mint set quarters were type M and due to the common action of cutting the Kennedy out of those sets, 1970-D Type M is very common in dealer stocks. Anyway, here are the dates and percentages: 1968-S Proof (75%) 1969-D (12%) 1970 (6%) 1970-D (11%) Does that seem correct to any of the experts out there? As I understand it, 1969-D and 1970-D each exist with Type B, Type C (which is the "normal" reverse for those years) and Type M reverses.
