Caligula, AE29 of Thrace, with Rhoemetalkes III. AD 38-46. 22.16 g. GAIO KAISARI GERMANIKW SEBASTW, laureate head of Caligula left. BASILEYS ROIMHTALKAS KOTYOS, Caligula seated left on curule chair, presenting diadem to Rhoemetalkes standing right, holding spear. RPC I 1722; BMC 1; Jurukova 212-213. With permission of Numismatik Lanz München auction 166, lot 119, June 2018.