Severus Alexander, AR Medallion of 12 denarii, AD 222–235. 35.62 g. 

IMP ALEXANDER PIVS AVG IVLIA MAMAEA AVG, MATER AVG laureate, 
draped and cuirassed bust of Severus Alexander right, facing the 
diademed and draped bust of Julia Mamaea left.
AEQVITAS PVBLICA, The three Monetae standing, two looking left, 
the middle one facing, each holding scales and cornucopiae; 
piles of coins at their feet.

Cohen 2 var (rev. legend); Gnecchi -; Jameson II, 219 (this coin).

Unique. 
Ex Jameson and William James Conte collection.

With permission of Numismatica Ars Classica, Auction 51, March 2009.
Estimate: 250,000 CHF