Valerian, AE23 of Tium, Bithynia. AD 253-260. 5.64 g. P L OYALERIANOC, laureate, draped and cuirassed bust right. TIANWN, river-god Billaios reclining left, prow at his side, holding short rod and reed, resting left arm on an overturned urn. RecGen 171; SNG von Aulock 1037. With permission of J.F. Jacquier auction 52, lot 557, Sept. 2023.