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This is a nice ancient Roman silver Siliqua of emperor Constantius II minted at Lyon in France between 347 - 355 A.D.
Obverse: D N CONSTANTIVS PF AVG "Our Lord Constans Pious Fortunate August (Emperor)" pearl-diademed, draped, cuirassed bust right
Reverse: VICTORIA DD NN AVG "Victory of Our Lords and Augusti" - Victory walking left holding wreath and palm, one wing visible
A nice ancient coin in GVF condition.
DATE: 347 - 355 A.D.
MINTMARK: LVG (Lyon in France)
SIZE: 16.86mm diameter
WEIGHT: 1.81 grams
ATTRIBUTION: RIC VIII 214
PROVENANCE: Formerly in a private collection, Essex.