The finest-graded specimen of America’s “most beautiful coin."

The extended family of Stella McCartney, the fashion-designer daughter of former Beatle Paul McCartney, is locked in a legal battle over rights to profits from paintings by artists including Abstract Expressionist Robert Motherwell.

Rare gold brought strong prices at a Jan. 9 auction by Bowers and Merena, a division of Spectrum Numismatic Auctions.