Roman Mintmarks (Arranged in alphabetical order)
S
Siscia (Sisak, Croatia), also used for Seconda (2nd officina) at other mints
SD
Serdica (Sophia, Bulgaria)
SER
Serdica (Sophia, Bulgaria)
SERD
Serdica (Sophia, Bulgaria)
SIR
Sirmium (Sremska Mitrovica, Serbia, 75 km West of Belgrade on the river Sava)
SIRM
Sirmium (Sremska Mitrovica, Serbia, 75 km West of Belgrade on the river Sava)
SIROB
Sirmium (Sremska Mitrovica, Serbia, 75 km West of Belgrade on the river Sava)
SIS
Siscia (Sisak, Croatia)
SISC
Siscia (Sisak, Croatia)
SISCPS
Siscia (Sisak, Croatia)
SM
Sirmium (near Mitrovica, North Serbia)
SMAL
Alexandria, Egypt
SMAN
Antioch - Antiochia (Antakiyah, Syria)
SMAQ
Aquileia, Italy
SMBA
Barcino (Barcelona, Spain)
SMH
SMHT
Heraclea (Marmara Ereglisi, Turkey)
Heraclea (Marmara Ereglisi, Turkey)
SMK
Cyzicus (Kapu Dagh, Turkey)
SMN
Nicomedia (Izmit, Turkey)
SMR
Rome, Italy
SMSD
Serdica (Sophia, Bulgaria)
SMTR
Treveri (Trier, Germany)
SMTS
Thessalonica (Salonika, Greece)