Watch List notes:

CAPPADOCIA. Caesaraea-Eusebia. Diadumenian, as Caesar, 217-218. Tetrassarion (Bronze, 28 mm, 11.80 g, 6 h), RY 2 = 218. M OΠ ΔIAΔOY•ANTωNЄI Bare-headed, draped and cuirassed bust of Diadumenian to right. Rev. MHTPO KAICAPI NЄΩK Altar surmounted by Mount Argaios; on altar, ЄT B. Megaw CAP3 var. (date in exergue). Sydenham 509 var. (date in exergue). Very rare. Flan crack and somewhat rough, otherwise, very fine.