Britain's oldest working television set has sold for £16,800, three times its estimate.
The Marconi type-702 set, which has a 12-inch screen, was bought for £100 in 1936, and is now owned by a US investor following furious bidding at Bonhams in London.
The set was created by Scotsman John Logie Baird and the Italian investor Guglielmo Marconi, using technology employed in secret radar research.
Bonhams specialist Laurence Fisher told the Daily Mail: "I've handled 38 pre-war tellys and this is the finest and even comes with the original invoice.
"It is very rare. There are more authentic Stradivarius violins in existence than pre-war televisions."
The original south-London owner was unable to watch the one-hour of programmes available in 1936 as the Crystal Palace transmitter burned down just three days after he bought the set. Service was not resumed until 10 years later, when there was still only an hour of programming on offer.
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