Watch List notes:

Vologases IV (147-191), Tetradrachm, Seleukeia on the Tigris, May AD 177; AR (g 13,83; mm 27; h 12); Bearded bust l., wearing double banded diadem and tiara; behind, B, Rv. ΒΑΣΙΛΕΩΣ / ΒΑΣΙΛΕΩΝ / ΑΡΣΑΚΟY / OΛΑΓΑΣΟΥ / ΔΙΚΑΙΟY / ΕΠΙΦΑΝΟYΣ / ΦΙΛΕΛΛΗΝΟΣ, king enthroned l., receiving a diadem from Tyche l.; above, ΘΠΥ. Sellwood 84.59.
Dark patina, about extremely fine.

Ex Glendining & Co, 1955, lot 660.