A 69-year-old grandmother who was about to throw a box of old coins in the bin was shocked to discover that one of them is worth £100,000.

The unnamed woman from Hull didn't realise she was in possession of the Rawlin's Oxford Crown, an exceptionally rare coin minted in 1644, during the reign of Charles I.

She inherited the piece, which was among a shoebox full of coins, decades earlier from her grandfather and recently rediscovered it while clearing out the attic.

But it was only when she posted it to Leeds-based website Vintage Cash Cow, alongside other items of costume jewellery and a silver plated tea set, that she discovered the true value.

Now experts from the site are organising the auction of the coin, which is expected to take place in either London, New York or Hong Kong and fetch more than £100,000 thanks to its rarity andexceptionally good condition.

It's thought that the coin is one of one of only 100 that were produced.

What is the Rawlin's Oxford Crown?
Thomas Rawlins was a medalist and playwright born around 1620, who also worked as a goldsmith and gem engraver.

After the outbreak of the English civil war he was based at the King Charle's I's headquarters in Oxford and his signature appears on coins of the Oxford mint from 1644 to 1646.

In 1644 he produced a coin, known as the Oxford crown because of the view of the city behind the King's figure on horseback.

On the reverse it details his aimed in the war - to uphold the Protestant religion, laws of England and freedom of parliament.

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Grandmother discovers a rare coin from 1644 in a box of 'junk' from herattic that she was going to throw in the bin - and now she's set to make £100,000(http://www.dailymail.co.uk/femail/article-5835561/Grandmother-discovers-rare-coin-worth-100K-box-junk.html)