Valentinian I, AR Siliqua, Nicomedia. 367-375 AD. 

DN VALENTINI-ANVS PF AVG, pearl-diademed, draped, cuirassed bust right.
VOT X MVLT XX in four lines within wreath.

Mintmark SMN

RIC IX Nicomedia 22a.
Rated Rare.

Sold by Aurea Numismatika Auction 71, Lot 2437, May 2016.
(described as a solidus in error).