A Postal Commemorative Set, 25 Years Of Americas Finest Coinage Incomplete, in a brown binder Grades. A Postal Commemorative Set, 25 Years Of Americas Finest Coinage Incomplete, in a brown binder. A Postal Commemorative Society set. The set is not complete. It contains 14 years of proof sets mounted on an informational card with a commemorative stamp corresponding to the same year as the proof set.All housed in a brown vinyl binder. The years included are 1970, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1981, 1986, 1990, 1991, and 1992.