Watch List notes:

SELEUKID EMPIRE. Tryphon. Circa 142-138 BC. AR Tetradrachm (30mm, 16.92 g, 12h). Antioch on the Orontes mint. Diademed head right / BAΣIΛEΩΣ TPYΦΩNOΣ AYTOKPATOPOΣ, spiked Macedonian helmet with cheek guards, adorned with wild goat's horn above visor; monogram to inner left, AΓ below; all within oak wreath. SC 2031.3b; Seyrig p. 22, 5 and pl. I, 15 (same dies); SMA –; CSE 257; HGC 9, 1055. Toned, minor die flaw in field on obverse, slightly off center and light scuff on reverse. Near EF. Choice portrait of short-lived king. Very rare.

From the Weise Collection. Ex Classical Numismatic Group 61 (25 September 2002), lot 841; Tkalec & Rauch (16 November 1987), lot 153.