Trebonianus Gallus AE24 of Prusa ad Olympum, Bithynia. AD 251-253. 7.49 g. G OYEIBIOC TREBWNIANOC GALLOC A, radiate, draped and cuirassed bust right. PROYCAEWN, Serapis standing front, holding sceptre and holding corn-ears in his raised right hand. Previously unpublished reverse. Nomos 15, 557; RPC IX 216A With permission of Nomos AG - obolos 15, Lot 557, May 2020.