The 10-coin double set, created in 1915 for the Panama-Pacific Exposition, contains two examples of each of the five 1915-S Panama-Pacific commemorative coins, including the rare and impressive $50 gold pieces. Housed in a beautiful copper-and-glass frame with a velvet interior, the double set is truly extraordinary. It is also extremely rare; less than a dozen of these sets were sold, and even fewer have survived.
NGC Chairman and Finalizer Mark Salzberg recalls seeing one such set, about 30 years ago, but not having the opportunity to examine it in hand. As a result, the submission of this set was particularly exciting for the seasoned grader, who said: “It was a highlight of my career to grade these phenomenal coins.”