Nazi-code breaker's notebook set for auction

A handwritten notebook by Alan Turing is going on the auction block. (Supplied)

A handwritten notebook by Alan Turing is going on the auction block. The Nazi code-breaking genius is depicted by Benedict Cumberbatch in the Oscar-nominated ‘The Imitation Game.’

It's expected to sell for at least $1 million at Bonhams in New York on April 13.

The 56-page manuscript was written when the mathematician was working to break the German Enigma codes used throughout World War II. It contains his complex mathematical and computer science notations.

The auctioneer says it's believed to be the only extensive Turing manuscript known to exist.

The notebook was among the papers Turing left in his will to friend and fellow mathematician Robin Gandy.

The seller is anonymous. Bonhams says part of the proceeds will be donated to charity.


 

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