Watch List notes:

Thrace, Byzantion AR Drachm. Countermarked circa 220 BC on Celtic imitative drachm, struck circa late 4th - early 3rd century BC. Head of Herakles right, wearing lion skin headdress; double countermark: prow right, 'ΠΥ above, Λ below / Zeus Aëtophoros seated left, holding sceptre. Stancomb 2007, pl. 4, 10 (this coin); M. Thompson, "A Counter-marked Hoard from Büyükçekmece" in MN VI (1954), I. 3.91g, 18mm, 2h.

Good Fine. Rare.

From the William Stancomb Collection;
This coin published in W.M. Stancomb, Some Countermarked and Overstruck Hellenistic Coins from the Region of the Thracian Bosporus, The Numismatic Chronicle, Vol. 167 (2007);
Ex Münz Zentrum Rheinland, Auction 134, 30 August 2006, lot 46.