A medieval gold coin that was discovered down a drain in Norfolk is set to sell for thousands of pounds at a top London auction.

The "remarkably well-preserved" artefact was found as part of a hoard of other treasure in a field drain in East Raynham, near Fakenham, more than 100 years ago.

It dates back 700 years to the time of King Edward III who ruled England between 1327 and 1377 and shows him standing on a warship holding a long sword and shield during a naval victory over the French.

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Eastern Daily Press: The coin was found in East Raynham in 1911The coin was found in East Raynham in 1911 (Image: SWNS)

Eastern Daily Press: It depicts King Edward III holding a long sword and shield during a naval victory over the FrenchIt depicts King Edward III holding a long sword and shield during a naval victory over the French (Image: SWNS)

Following its discovery in 1911, the British Museum reviewed the coin and "disclaimed" it, handing it back to the finder.

It was then sold to its current owner in 1970. 

It is now set to appear at Spinks auction house in London on April 4 where it could fetch around £8,000.

Auctioneer Gregory Edmund said: "For this remarkably preserved and high-value medieval coin to have languished in a lowly field drain for centuries before coming to light is, if anything, quite romantic."