Watch List notes:

Diadumenian, as Caesar, Ӕ23 of Caesarea, Cappadocia. Dated RY 2 of Macrinus = AD 217/8. M ΟΠ [..] ΔIAΔO ANT, bare-headed, draped and cuirassed bust right / MHTPOΠ[O KAICAPIA, altar decorated with small Mount Argaeus, surmounted by four ears of corn; ET B (date) below. Sydenham, Caesarea -; BMC -; SNG Von Aulock -; for reverse type, cf. RPC Online 6683 (temporary, Elagabalus). 11.59g, 23mm, 6h.

Very Fine. Apparently unpublished.