Watch List notes:

Moesia Inferior, Drachm, Istros, c. 400-300 BC; AR (g 3,46; mm 17; h 12); Two facing heads side by side, one reverted, Rv. IΣTPIH, bird flying l., holding dolphin with claws; below, Δ. SNG BM Black Sea 245.
Rare variant, cabinet tone, extremely fine.