Istros, Thrace, AR drachm, 17.3 mm, 5.49 g.

Obv: Two male heads facing, the one on the right inverted.
Rev: ISTRIH above sea-eagle standing left on dolphin.
Two dots, one above the other in right field, A in exergue.

Talmatchi Studia VIII, 18; ICEM Tulcea 54.011; Canarache 169 var (left head inverted)

Image courtesy of G. Talmatchi in Studia VIII.