Watch List notes:

Thrace. Byzantium. c. 420-390 BC. Drachm, 3.32g. Obv: Cow left. Symbol above. Rx: Square incuse partitioned by two diagonal lines. This variant apparently unpublished. VF.

With its reverse punch reminiscent of Thracian issues of the first half of the fifth century, this specimen appears to be one of the earliest coins of Byzantium.