Watch List notes:

PHOENICIA, Aradus. Diadumenian. As Caesar, AD 217-218. AR Tetradrachm (28mm, 10.54 g, 12h). Radiate, draped, and cuirassed bust right / Eagle standing facing, head and tail left, with wings spread, holding wreath in beak; crescent between legs. Prieur 1291 (this coin). Good VF, toned, a touch of porosity. Extremely rare, only one known to Prieur, and none in CoinArchives.

From the Michel Prieur Collection. Ex Empire Coins FPL 46 (1989), no. 39.