A lot of 1970 to 1980s US Postal Service Souvenir Mint Sets of Commemorative Stamps. A total of 16 albums of postage stamps issued in 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1980, 1981, 1982, 1983, 1984, 1985, 1987, 1988. 1989. Philately And Topical Stamp Collecting, Americana Collectibles And Memorabilia.