MYSIA. Parium. Diadumenian, as Caesar, 217-218. Assarion (Bronze, 20 mm, 5.02 g, 7 h). M OPE DIADVME[N]IANVS CA Bare-headed and draped bust of Diadumenian to right, seen from behind. Rev. C [G] I H PA Genius standing front, head to left, sacrificing out of patera over lighted altar with his right hand and holding cornucopiae in his left. Plankenhorn, Mysien, p. 118, 73 (this coin). SNG Copenhagen -. SNG Paris -. SNG von Aulock -. Very rare and with a lovely portrait of the young prince. Minor smoothing, otherwise, good very fine.