Life and Death in Pompeii and Herculaneum you will have, no doubt, rightly been overawed by the wealth of wonders on display; pristine bronzes, dazzling frescoes, even human remains, all eerily preserved by the ashes spewed from Vesuvius on that fateful day: 24th August 79 CE.

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The first silver coins were produced from the early 3rd century BCE and resembled contemporary Greek coins.

These were worth two Greek drachmas and carried the legend ROMANO, later to become ROMA.

While the find has yet to be submitted for publication in an academic journal, an outside expert is convinced the coins are real.

This 2013 photo released by Uruma City Board of Education shows an excavation site where 10 coins including a few likely dating to the Roman Empire were found at Katsuren Castle in Uruma on Japan's southernmost prefectural island of Okinawa.

The period 72-50BC is among the least understood in Roman Republican numismatics. The slave revolt of Spartacus was defeated in 71BC and there was no large-scale trouble on Italian soil for 20 years excepting the brief revolt of Cataline, memorably dealt with by Cicero.

The war with Mithradates of Pontus was carried out in distant Asia, likewise the defeat of Crassus at Carrhae in 53BC.

Roman coinage, as in other societies, represented a guaranteed and widely recognised value which permitted an easy exchange of value which in turn drove both commerce and technology development as all classes could work to own coins which could be spent on all manner of goods and services.

Even more significantly, large and identical payments could now be easily made which made possible a whole new scale of commercial activity.

While the find has yet to be submitted for publication in an academic journal, an outside expert is convinced that the coins are real.

(Uruma City Board of Education via AP) He had been to archaeological sites in Italy and Egypt, and recognized the "little round things" as old coins, including a few likely dating to the Roman Empire.

Inscriptions on buildings, gravestones, etc may also identify known figures.