Byzantion in Thracia, 38-46 AD., Rhoemetalces III. in the name of Gaius, As, RPC 1725.

Byzantion in Thracia, Thracian Kings, Rhoemetalces III. in the name of Gaius (called Caligula), 38-46 AD.(?),
Æ As (22 mm / 8,25 g),
Obv.: ΓAIΩ KA - IΣAPI , laureate head of Caligula, l..
Rev.: BAΣIΛE - ΩΣ (retrograde) , Nike (Victoria / Victory), advancing right on globe, holding wreath and palm.
RPC I, 315, 1725 (4 specimens cited) ; BMC Agrippa 21 .

Rhoemetalces III was given the throne of Thrace by Caligula.

This issue was for many years attributed to Agrippa I (Meshorer 278, no. 2) until Burnett assigned it to Thrace and Rhoemetalces III (on the basis of style and die axis)