Anonymous AE18 quadrans. Time of Domitian to Antoninus Pius AD 81-161. Rome. 3.1 g.

Obv: Helmeted and cuirassed bust of Mars right. 
Rev: S-C. Cuirass. 

RIC 19; Cohen 26-27.

With permission of Pecunem Gitbud & Naumann, Auction 14, Lot 607, March 2014.