Watch List notes:

BAKTRIA, Greco-Baktrian Kingdom. Antimachos I Theos. Circa 180-170 BC. AR Tetradrachm (33mm, 16.01 g, 12h). Diademed and draped bust right, wearing kausia / Poseidon, laureate, standing facing, holding trident and filleted palm; AP to inner right. MPHB 342 (O54/R157 – this coin); Bopearachchi Série 1 (monogram unlisted), but cf. 5B (Æ; for monogram); Qunduz –; cf. HGC 12, 106 (for type); Zeno –. Toned, areas of corrosion, cleaning marks. minor roughness. VF. Apparently unique, only this coin known to MPHB and only this coin in CoinArchives.

From the Lampasas Collection. Ex Classical Numismatic Group Electronic Auction 410 (29 November 2017), lot 136; Vecchi 2 (13 September 1996), lot 618.