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mickb6265: Winston..
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mickb6265: dispatch rider's norton..
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mickb6265: Turing office..
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mickb6265: Alan Turing..
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mickb6265: Churchill's praise for those on the wall..
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mickb6265: typex serial no 1
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mickb6265: Siemens and Halske T52
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mickb6265: Petard's Chronometer..
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mickb6265: The Wall of Distinction..
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mickb6265: index filing system..
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mickb6265: Typex mk.22..
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mickb6265: The Enigma Machine..
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mickb6265: Turing's corridor..