Watch List notes:

PAPHLAGONIA, Sinope. Circa 230-200 BC. AR Tetradrachm (29mm, 16.84 g, 1h). In the name and types of Alexander III of Macedon. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; in left field, a above ΣI; below throne, monograms above and below strut. Price 1258–60 var. (monogram below strut, same obv. die as illustration of 1258); Newell, Sinope 32–3 var. (same); HGC 7, 401 corr. (references). VF, toned, light marks, struck with worn obverse die. Unpublished variety.

From the Colin E. Pitchfork Collection. Ex Dr. Will Gordon Collection (Classical Numismatic Group Electronic Auction 351, 20 May 2015), lot 238.

The monogram below the strut appears to be a combination of the letters ΣE, as on the Sinope staters of Price 1247–8.