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Lot 4

A Charles Wheatstone Cryptograph,
English, mid 19th century,

31 October 2017, 13:00 GMT
London, Knightsbridge

Sold for £1,687.50 inc. premium

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A Charles Wheatstone Cryptograph, English, mid 19th century,

signed The Cryptograph C.Wheatstone Inv., the circular dial without outer alphabet, number scale and inner letters missing. As the outer hand completes one revolution, the inner hand advances by one letter, in original velvet lined leather case with lid lettered THE CRYPTOGRAPH, the dial 4in (10cm) diameter

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