1915-S Panama-Pacific Exposition $50. Round. MS-63 (PCGS). Rich swaths of honey-gold encircle the borders of this vibrant Pan-Pac $50, contributing to a complexion that is nothing less than stunning. This deep toning is accented by otherwise yellow-gold coloration and strong satiny luster. The designer of these coins was Robert Aitken, a well known sculptor of the early 20th century. The obverse of the Panama-Pacific Exposition $50 gold coins depicts helmeted Athena surrounded by the legend UNITED STATES OF AMERICA and the denomination spelled out as FIFTY DOLLARS below. The reverse design features a large owl facing nearly forward, perched on a thick pine branch, with large pine cones below and in the background. The motto E PLURIBUS UNUM is tucked into the field behind the owl.Elusive at all levels of preservation,