C. Antestius AR Denarius. 146 BC. AR Denarius, 18 mm, 4.09. Rome mint. 

C AESTI behind helmeted head of Roma right, X beneath chin.
The Dioscuri riding right; dog below. ROMA in exergue.

Crawford 219/1e; Sydenham 411; Antestia 1. 

With permission of cngcoins.com, auction 414, Lot 477, Feb 2018