Elizabeth II platinum Proof Unofficial Uniface "National Parks" 100 Dollars 1985 PR67 Deep Cameo PCGS, KM144 var. 16.73gm. 90% Pt; 10% Rh. A highly intriguing curiosity in a series that has yielded an unusually high number of dramatic mint errors. In the past few years our auction house alone has sold three double-struck, two die cap brockages, and a single copper uniface issue for this very same commemorative. HID09801242017 © 2023 Heritage Auctions | All Rights Reserved

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