Watch List notes:

Seleukid Empire, Seleukos I Nikator, Second Satrapy and Kingship (312-281 BC), AR Tetradrachm, Uncertain Mint, struck in the name of Alexander III, head of Herakles right, wearing lion skin, rev. Zeus Aëtophoros seated left, delta in left field, QE below throne but above crossbar, 16.96g, 8h (SC 295; Price 3786; HGC 9, 10h [R3]), a banker's mark in reverse field, rubbed, otherwise fine, the variety listed as extremely rare by HGC.
Provenance
Noble Numismatics (Australia), 23 March 2021, lot 2723
Dr Will Gordon, CNG e-Auction 375, 1 June 2016, lot 430
Estimate: £200 - £250