Web site: https://www.ancient-jewellery.com/
This is a nice ancient Roman silver Siliqua of emperor Gratian dating to 367 - 383 A.D.
DN GRATIANVS P F AVG pearl-diademed, draped & cuirassed bust right
VIRTVS ROMANORVM, Roma seated facing on throne, looking left, holding Victory on globe and spear
This coin was minted at Trier (in Germany), mintmark TRPS.
DATE: 367 - 383 A.D.
MINTMARK: TRPS (Trier, Germany)
WEIGHT: 1.73 grams
ATTRIBUTION: Trier, RIC 58a