Auction purchase by Mitch Spivack, MonsterCoinMart’s Justin Spivack, and Steven Heller bought days later by avid collector
September 16, 2019 — The most valuable United States modern coin ever sold at auction, a 1975 Proof No S dime, changed hands twice in less than a week, both times for record prices.
The finer of the two known 1975 Proof dimes without the San Francisco “S” mint mark was jointly purchased on September 6, 2019, for $456,000 by modern coin specialist Mitch Spivack along with his son, Justin, owner of MonsterCoinMart in Orange County California, and with collector Steven Heller also as a partner on the deal
