Imbros, Islands of Thracia, 27 BC. - 14 AD., Augustus, Æ 18, RPC 1736.

Imbros, Islands of Thracia, Augustus, 27 BC. - 14 AD.,
Æ 18 (17-18 mm / 6,22 g),
Obv.: ΣEBAΣ , bare head r.; before, countermark, star of six rays.
Rev.: IMB , caduceus between the caps of the Dioscuri with stars on top.
RPC I, 317, 1736 (12 pieces listed, 11 with this countermark) ; SNG Cop. 967 ; for countermark; Howgego (GIC) p. 188, 431 (20 listed) .