COIN (ROMAN)
Silver Republican denarius of Caius Antestius, Mint of Rome, 146BC, countermarked with upside down VI on the cheek, possibly referring to the 6th Roman legion (which later fought under Julius Caesar in Gaul).  RRC 219/1d-e
Ruler: Republic
Moneyer: Antestius, C.
Denomination: Denarius (Roman Republic)
Material: Silver
Mint: Rome
Obverse: head of Roma facing right, wearing winged helmet, the visor being less peaked and the three pieces more separate than other examples made by this moneyer, the earring is of a single drop and there is an X under the chin;
overstamped with VI, upside down, on cheek
Obverse legend: [C.AESTI]
Reverse: Dioscuri (Castor and Pollux) on horseback charging right with dog running to the right under forelegs of horses.
Reverse legend: In exergue: ROMA
Dated: -146.0 to 
Weight (g): 3.12
Diameter (mm): 17.8
Thickness (mm): 1.9
Completeness: Complete
Parish: St. Winnow
District: Cornwall
County: Cornwall
Region: South West
Discovery method: Metal detector
RRC reference: rrc-219.1d
Notes: This is one of the earliest Roman coins found as a site-find in Britain