(28) mint sets including (2) 1966, (2) 1967, (4) 1971, 1972, (2) 1973, (3) 1985, (6) 1988 and (2) 1991 (6) 1992; together with (3) 1971 40% US silver $1 Eisenhower, a 1990 prestige set with a 90% US silver $1 Eisenhower Centennial and (2) 3-coin 40% silver Bicentennial proof sets