NUMERIAN as Caesar Silvered Antoninianus.

Obv: M AVR NUMERIANVS NOB C, Radiate, draped bust right
Rev: MARS VICTOR, Mars advancing right, holding spear and
     trophy
Sear (4th ed) 3424, RIC V-2. 353.

Sold on ebay in March 2010 by French seller Philippe Lacoste.