Ancient Roman silver denarius of emperor Septimus Severus / Annona

This is an ancient Roman silver denarius of emperor Septimius Severus, minted in Rome between 197 - 198 AD. 

Obverse:   L SEPT SEV PERT AVG IMP X "Lucius Septimius Severus Pertinax, emperor (Augustus), supreme commander (Imperator) for the tenth time." laureate head right. 

Reverse: ANNONAE AVGG, "The grain supply of the emperors (Augusti)" Annona, draped, standing left, right foot set on prow, holding corn-ears in right hand and cornucopiae in left hand.

CULTURE: ROMAN

DENOMINATION: Denarius

MATERIAL: Silver

DATE: 193 - 211 AD (this coin was minted between 197 - 198 AD)

SIZE: 16.3mm dia

WEIGHT: 2.71 grams

ATTRIBUTION: RIC IVi, 107, page 103 - Cohen 37

PROVENANCE: Private collection Isle of Wight, originally a metal detector find from the Thetford area.