Edessa, Mesopotamia, King Wael AD 163-165, AE 22mm.

Bearded head of Vologases IV, wearing tiara, diademed helmet with back-flap, B behind.
"Wael Malika" in local script, bare-headed and bearded bust of King Wael left, within laurel wreath. 

Sear GIC 5726; BMC 1; Babelon 1. 
Very rare.

With kind permission of Baldwin's Auctions Ltd, Auction 37, lot 772. Sold for £100 (approx. $161)