Seleukid Kings. Antiochos I Soter (281-261 BC). AR tetradrachm (28mm, 16.86g). Seleukeia on the Tigris mint. Diademed head of Antiochos I r. / Apollo seated l. on omphalos, testing arrow and resting hand on grounded bow; to l., monogram; to r., monogram. Apparently unpublished varity with these monograms. Cf. SC 379 and HGC 9, 128g for types.