ROMAN. Silver Exagium Coin Weight. 4th century AD. 4.30 gm. A base silver imitation of a western solidus of Valentinian II (375-392 AD): Diademed, draped and cuirassed bust right / Two emperors enthroned with Victory behind them; COM in exergue, but lacking the field marks for the specific mint. The coin was plugged with two silver "buttons" to bring it closer to a full solidus weight. Good VF, may have been gilt at one time. Probably an unofficial merchant weight.