Magnentius, AV 3 solidi medallion, 37 mm, Aquileia, AD 350–353. 13.70 g. 

DN MAG MAG–NENTIVS AVG, bare-headed bust right, wearing
imperial mantle.
LIBERATOR REI PVBLICAE, Magnentius, nimbate and in military 
dress, on horse pacing right, offering his right hand to the 
turreted and draped figure of Aquileia, holding cornucopiae 
and scroll. 

Mintmark SMAQ. 

RIC 127 (this coin, weight corr.); Bastien, 339a (ditto); Biaggi 2204 (this coin).

An apparently unique variety of a very rare type. 
With permission of Numismatica Ars Classica
Auction 34, lot 95, Nov. 2006