Magnentius, AV 9 siliquae. Aquileia AD 351. 1.56 g. 

DN MAGNENTIVS AVG, bare-headed, draped, cuirassed bust right.
FELICITAS PERPETVA, Victory walking left, holding wreath and 
palm branch.

Mintmark SMAQ.

RIC VIII Aquileia 138; Cohen 2; Depeyrot 7/2; Bastien 345; Biaggi 2193 (this coin).
Extremely rare.

With permission of Numismatica Ars Classica, auction 100, Lot 673, May 2017.
Estimate: 8000 CHF.