Watch List notes:

Mesopotamia, Edessa. Gordian III. A.D. 238-244. AE 24 (23.88 mm, 8.85 g, 11 h). Struck A.D. 242-244. AVTOK K M ANT ΓOΡΔIANOC CЄB, laureate head of Gordian III right, star beneath chin / ABΓAPOC BACIΛЄVC, diademed, tiarate head of Abgar IX right, star behind. SNG Cop. 228; Cf. BMC 164; Babelon, Edessa 88. VF, dark green, slightly porous patina, lighter green deposits in recesses. 

Most catalogers confuse this laureate head only of Gordian III with the far more common radiate, draped and cuirassed, seen from behind.