Watch List notes:

Seleucids of Syria, temp. Antiochos I Soter, or Antiochos II Theos, in the name of Antiochos (c. 281-242 BC), AR Tetradrachm, 16.78g, Seleukeia on the Tigris, diademed head right, rev. Apollo Delphios seated left on omphalos, testing arrow and with bow resting behind baie- to right, antioxoy to left, monogram to outer left, HP monogram below, good fine.
The cataloguer is unable to trace a comparable excample with this sequence of monograms on Coinarchives
Estimate: £100 - £150