COIN (ROMAN)
Silver Roman Republican denarius, mint of Rome, moneyer: C. RENI (probably Caius Renius), 138BC.

C. Reni(us) is otherwise unknown.  This is a common issue, there being 141 obverse dies and 176 reverse dies.

Ruler: Republic
Denomination: Denarius (Roman Republic)
Material: Silver
Mint: Rome
Mintmark: ROMA
Obverse: Helmeted head of Roma right; behind head, X

Reverse: Juno in biga (two animal chariot) pulled by goats right; she wears (diadem and holds sceptre and reins in left hand, and whip in right hand); below, C.RENI

Reverse legend: C.RENI
Dated: -138.0 to 
Diameter (mm): 15.0
Thickness (mm): 1.0
Parish: Restricted Access
District: North Kesteven
County: Lincolnshire
Region: East Midlands
Place known as: Heckington
Discovery method: Metal detector