Watch List notes:

Commemorative Medals and Tickets, William Prince of Orange (later William III, King of England), and his mother, Princess Mary, cast silver medal [1677], by Nicholas Chevalier (d. 1720), armoured bust of William r., with flowing hair and lace cravat, G WILH III DG PR INC AVR HOLL ET WESTF GVB, rev. draped bust of Princess Mary l., MARIA DG PRINC M BRIT AVR DOTARIA ETC., 41.5mm. (MI.570/239), very fine and extremely rare
Although made at the time of William's marriage to Princess Mary, daughter of James II (later Queen of England), the medal depicts his mother, the daughter of Charles I.