Watch List notes:

MESOPOTAMIA. Nisibis. Gordian III, with Tranquillina, 238-244. Oktassarion (Bronze, 32 mm, 17.16 g, 6 h). AYTOK K M AN ΓOPΔIANON CAB TPANKYIΛΛAN CEB Confronted busts of Gordian III, laureate, draped and cuirassed to right, and diademed and draped bust of Tranquillina to left. Rev. CEΠ KOΛON NECIBI METPO Tyche seated left on rocks, holding grain ears; below, river god swimming left; above, Aries left. BMC 14. SNG Copenhagen 238. Brown patina. Die-shift on reverse, otherwise, very fine.
From the W. F. Stoecklin Collection, Amriswil, Switzerland, acquired from Münzen & Medaillen, Basel, prior to 1975.