An amateur historian using a metal detector in a farmer's field has told how he found a once-in-a -lifetime hoard of 2,000-year-old silver Roman coins - worth up to £200,000 ($267,000).

Some of the metal disks were minted during the era Roman general Mark Antony was allied with his lover Cleopatra in Egypt and experts said a find of this size and variety is very rare.

A single coin can sell for up to £900 ($12,000) so fisherman Mike Smale, 35, was astonished when he uncovered one pristine coin after another dating back to 32BC.

The coins will be handed over to the coroner for valuation and then likely sold to a museum, with the profits split between the farmer and Mr Smale.

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Some of the coins (pictured) were minted during the era Roman general Mark Antony was allied with his lover Cleopatra in Egypt and a find of this size and variety is very rare

WHAT ARE THE COINS? An expert who has examined photos of the coins said some feature Gods, and were issued by the Roman Republic in the centuries before the birth of Christ. Some of the metal disks were minted during the era Roman general Mark Antony was allied with his lover Cleopatra in Egypt and experts said a find of this size and variety is very rare. They would have circulated widely in the Roman Empire and travelled a long way. Republican coins and those of Antony were issued before the Roman Invasion of Britain in AD 43, and would have drifted over in the pockets of Roman soldiers and citizens alike, according to an expert. Other coins were issued by emperors who ruled during the first century AD. One of the coins celebrated the ill-fated emperor Otho, who only ruled for three months in (January to April AD 69), during the civil wars which followed the assassination of the notorious emperor Nero. Advertisement

Mr Smale, 35, found the hoard of 600 rare ancient coins in a farmer's field in Bridport while hunting with friends from the Southern Detectorists club.

Father-of-one Mr Smale, a fisherman from Plymouth, Devon, said: 'It was incredible, a true once-in-a-lifetime find.

'I had a good idea about what it was - I had already found one or two Roman denarii that morning.

'It's a great find, my biggest one, but I shan't be giving it up. It's great fun and I'm sticking with it', he said.

The astonishing find was made at an undisclosed farmland location in Bridport at the detectorists annual event, attended by 300 people.

'When I found it everyone came over to have a look and find out what it was', said Mr Smale.

'It's impossible to say what it's worth, it all depends on too many factors.. How rare they are, what condition they are in, things like that.

'But it is a substantial find, and whatever I do get I'm going to split with the guys I went up there with.'

Just a few hours in, Mr Smale's detector started beeping manically and he quickly discovered a few coins, before he called over the officials who sectioned off the area.

They believe it was a pot of coins which had been hit by a plough and spread across the area.

The event was organised by Sean MacDonald, 47, who admits he would have paid 'good money' just to witness the find.

Just a few hours in, Mr Smale's detector started beeping manically and he quickly discovered a few coins, before he called over the officials who sectioned off the area

A single one can sell for up to £900 ($12,000) so the fisherman was astonished when he uncovered one pristine coin after another dating back to 32BC

Mike Smale (left), 35, found the hoard of 600 rare ancient coins in a farmer's field in Bridport while hunting with friends from the Southern Detectorists club. He is pictured here with farmer Anthony Butler

He added: 'Bridport is a cracking area anyway, it's very rich in history, but a find like this is unprecedented.

'I've never seen a hoard of this size before. We found one in Somerset last year but there were just 180, and they weren't of the same calibre.'

Mr MacDonald said he was elated he was shaking when he saw the find.

'The archaeologists excavating it couldn't believe what they were seeing because these coins are so rare', said Mr MacDonald.

The coins will be handed over to the coroner for valuation and then likely sold to a museum, with the profits split between the farmer and Mr Smale

Republican coins and those of Antony were issued before the Roman Invasion of Britain in AD 43, and would have drifted over in the pockets of Roman soldiers and citizens alike

The astonishing find was made at an undisclosed farmland location in Bridport at the detectorists annual event, attended by 300 people

An expert who has examined photos of the coins said some feature Gods, and were issued by the Roman Republic in the centuries before the birth of Christ

'I personally think a find of this size and variety will never be found again.'

An expert who has examined photos of the coins said some feature Gods, and were issued by the Roman Republic in the centuries before the birth of Christ.

'Others, which feature a distinctive galley - a type of Roman vessel - were minted by Mark Antony while he was allied with his lover Cleopatra in Egypt, between the Autumn of 32 BC to the Spring of 31', said Dominic Chorney of A.H. Baldwin & Sons.

These coins each celebrated the various legions under his command, Mr Chorney explained.

Elizabeth Taylor as Cleopatra and Richard Burton as her lover Mark Antony in the 1963 film of the Egyptian queen. Some of the coins were minted when the Roman general was allied with Cleopatra in Egypt

The historian who was digging in a farmer's field in Bridport has told how he found a once-in-a -lifetime hoard of 2000-year-old Roman silver coins worth up to £200,000 ($267,000)

Coin finds such as this are fascinating, and are incredibly important in shedding light on the history of Roman Britain, an expert said

They would have circulated widely in the Roman Empire and travelled a long way.

'Republican coins and those of Antony were issued before the Roman Invasion of Britain in AD 43, and would have drifted over in the pockets of Roman soldiers and citizens alike', said Mr Chorney.

Other coins were issued by emperors who ruled during the first century AD.

'One I can see in the photograph was struck for the ill-fated emperor Otho, who only ruled for three months in (January to April AD 69), during the civil wars which followed the assassination of the notorious emperor Nero', said Mr Chorney.

'Coin finds such as this are fascinating, and are incredibly important in shedding light on the history of Roman Britain', he said.