Revolutionary' watch once owned by King George III - but never fully paid for by him - is expected to make £1million as it goes under the hammer
French watchmaker Abraham-Louis Breguet made the gold Tourbillon Watch
The King had to buy it discreetly in 1808 because of the Napoleonic Wars
To prevent its seizure, Breguet signed the Tourbillon carriage inside the watch
A rare and revolutionary watch which belonged to King George III is expected to fetch up to £1million at auction.
French watchmaking 'genius' Abraham-Louis Breguet made the gold Tourbillon Watch which represented cutting-edge technology in the early 19th century.
Breguet was the celebrity watchmaker of his era and his creations were sought after by all the crowned heads of Europe, from Marie Antoinette and the King of Spain to Napoleon and Tsar Alexander I.
The watch features Breguet's groundbreaking Tourbillon invention - a mechanism that increases the accuracy of a watch by fighting gravity and correcting for positional error.
It is considered one of Breguet's most important timepieces and was the first Tourbillon he ever sold commercially.
It will go under the hammer at Sotheby's in London on July 14.
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