Last week I have found on the field this denarius of roman emperor Vespasianus. This coin was  stamped in period 69-79 years AD. This coin was probably used as a currency of german tribe, which settled here for a while  during  migration of nations.

Weight: 3.4 g.
Diameter: 17 mm

Obv: DIVVS AVGVSTVS VESPASIANVS.
Laureate head right.
Rev: Foreparts of two capricorns springing in opposing directions, supporting round shield inscribed S C; globe below.

Vespasian (17 November 9 – 23 June 79) was Roman Emperor from AD 69 to AD 79. Vespasian founded the Flavian dynasty that ruled the Empire for a quarter century. Vespasian was from an equestrianfamily that rose into the senatorial rank under the Julio–Claudian emperors. Although he fulfilled the standard succession of public offices, and held the consulship in AD 51, Vespasian’s renown came from his military success: he led the Roman invasion of Britain in 43 and subjugated Judaeaduring the Jewish rebellion of 66.