Watch List notes:

MOESIA. Istros. Circa 313-280 BC. Drachm (Silver, 18 mm, 5.67 g, 5 h). Two facing male heads side by side, one upright and the other inverted – a tête-bêche pair. Rev. ΙΣΤΡΙΗ Sea eagle standing left on dolphin, flanked by two pellets; below dolphin, monogram of ΑΠ. AMNG 417. HGC 3, 1802. SNG Black Sea 249. Beautifully struck with a superb old cabinet tone. Very fine.

From an old Swiss collection formed way before the 1990ies.