Watch List notes:

MYSIA. Pergamon. Circa 450 BC. Diobol (Silver, 11 mm, 1.58 g, 11 h), Gongylos or Eurysthenes as satrap. Laureate head of Apollo to right. Rev. ΠΕΡΓΑ Bearded male head to right, wearing Persian tiara; above, crescent; all within incuse square. SNG Paris 1546-8. SNG von Aulock 1347. Very rare. Light scratches and slightly porous, otherwise, about very fine.