Watch List notes:

SELEUCIS and PIERIA, Emesa. Diadumenian. As Caesar, AD 217-218. AR Tetradrachm (26mm, 11.04 g, 6h). Laureate, draped, and cuirassed bust right / Eagle standing facing, head and tail left, with wings spread, holding wreath in beak; between legs, radiate, draped, and cuirassed bust of Shamash left; crescent turned to left beneath eagle's head. Prieur 1019 (this coin). Lustrous, minor porosity, irregular edge. EF. Very rare, only seven noted by Prieur, and four in CoinArchives.

From the Michel Prieur Collection. Ex Münz Zentrum 53 (13 November 1984), lot 1969.