mgcoins database

Siscia AD 313-316 billon follis 3.44 g 2.16 cm 2.14 cm 6h

obverse: hd Constantinus r laureate IMP CONSTANTINVS P F AVG
reverse: Jupiter stg l holding Victory on globe and sceptre, eagle at feet IOVI CONSERVATORI, A, in ex SIS
RCV IV 15940
Schulman Auction 282 lot 2925 (12/12) Nov 1985

Constantine the Great (Flavius Valerius Constantinus) c 280 (Naissus - Moesia, now Nis, Serbia] 307-337
337 Died in Ancyrona, near Nicomedia - Bithynia, now Izmit -Turkey

Mint mark SIS = Siscia (Sisak - Kroatia)
Officina mark: A = 1
AD 311 6-7 grams
AD 313 3-4 grams (this coin)