SEALAND. 10 Dollars, 1972. NGC PROOF-66 Ultra Cameo. KMX-1. Mintage: 2,000. Featuring the head of Joan Bates, the wife of Sealands founder Roy Bates, this crown-sized fantasy issue also displays a clipper ship and emanates from the output of coins from the micronation located atop the HM Fort Roughs off the coast of Suffolk in the North Sea.