Watch List notes:

GREECE. Greco-Baktrian kingdom. Antimachos I, 180-165 BC. Tetradrachm, Baktra. Obv. Diademed and draped bust of Antimachos I right, wearing flat topped kausia. Rev. ΒΑΣΙΛΕΩΣ ΘΕΟΥ - ΑΝΤΙΜΑΧΟΥ. Poseidon, standing facing, holding long trident in his right hand and filleted palm branch in his left ; to lower right, monogram. Bopearachchi 1A ; HGC 12, 106 . AR. 16.83 g. - Nice AU-UNC
Ex. Numismatica Ars Classica auction 11, 29 April 1998, lot 118 ; From the collection of Regierungsrat Dr. iur. Hans Krähenbühl, Ex. Leu Numismatik Auction 8, 23 October 2021, lot 186. -
Well struck on a full flan, light porosity on the reverse.