Roman Republic
Cn. Lucretius Trio (136 BC), Denarius 136 BC, Rome mint
Overse: helmeted head of Roma right, X mark of value below chin
TRIO
Reverse: the dioscuri, Castor and Pollux, on horseback galloping right, cloak floating behind, each holding horizontal lance, ROMA in exergue
CN LVCR
Diameter 18 mm, weight 3.92 g