Web site: https://www.ancient-jewellery.com/
This is a nice excavated ancient Roman silver Siliqua of emperor Gratian dating to 367 - 383 A.D.
D N GRATIANVS P F AVG pearl-diademed, draped & cuirassed bust right
VRBS ROMA Roma seated left on cuirass, holding Victory on globe and reversed spear.
This coin was minted between the years 375 - 378 A.D. at Aquileia (Aquileia, in Italy), mintmark AQPS. It had traveled across the Roman Empire, being discovered by a metal detectorist in far-flung Yorkshire!
DATE: 375 - 378 A.D.
MINTMARK: AQPS (Aquileia, Italy)
WEIGHT: 1.5 grams
PROVENANCE: Found in Yorkshire, England.
ATTRIBUTION: RIC IX Aquileia 15b, rated rare