Valentinian II. AV solidus. AD 375-392. Milan mint. 4,32 g.

DN VALENTINI-ANVS PF AVG, pearl-diademed bust left,
wearing imperial mantle, holding mappa and sceptre.
VOTA PVBLICA, Valentinian II and Theodosius I seated
facing side by side, each holding mappa, Theodosius
also holding sceptre.
M-D across fields.
Mintmark COM. 

RIC IX Milan 9; Cohen 63 var; Depeyrot 10/3 (this coin cited)
Very rare. 
Ex Bank Leu AG, Auction 28 (5.-6. May 1981), lot 588. 

With permission of Numismatik Lanz, auction 102.
Note: Image artificially coloured, as the original image
was black and white.