BITHYNIA. Nikomedia. Trebonianus Gallus, 251-253. Oktassarion (Bronze, 24 mm, 5.47 g, 1 h). Γ ΒΙ ΤΡΕ ΓΑΛΛΟC ΑΥ radiate and cuirassed bust of Trebonianus Gallus facing left, holding spear and shield; redenominational countermark consisting of H within a circular incuse. Rev. [ΝΙΚΟΜ]ΗΔΕΩΝ ΔΙC ΝΕΩΚ[ΟΡΩΝ] Gallus riding to right on horseback, holding a spear. Rec 400. RPC IX, 360. Weiser 168-9. For the countermark, Howgego 821. Flan cut and countermarked, otherwise, very fine.