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This is an ancient Roman silver Siliqua of emperor Honorius dating to 393 - 423 A.D.
Obverse: DN HONORI-VS PF AVG, "Our Lord Honorius, Dutiful and Wise Augustus" Pearl-diademed, draped and cuirassed bust right.
Reverse: VIRTVS ROMANORVM "Courage of the Romans" Roma seated left on cuirass, holding inverted spear & Victory on globe.
This coin was minted at Mediolanum (Milan, in Italy), mintmark MDPS. It had travelled across the Roman Empire, being discovered by a metal detectorist in Lincolnshire.
DATE: 393 - 423 A.D.
MINTMARK: MDPS (Mediolanum , Milan, Italy)
SIZE: 16.10mm diameter
WEIGHT: 1.19 grams
ATTRIBUTION: RIC X 1228
PROVENANCE: Formerly in a private collection, Cheshire, found near Sleaford in Lincolnshire.