Catalogue description Operating instructions for the Glow Lamp Ciphering Machine 'ENIGMA'. This document is...

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Details of HW 25/7
Reference: HW 25/7
Description: Operating instructions for the Glow Lamp Ciphering Machine 'ENIGMA'. This document is undated but is thought to have been produced in the mid-1920s
Date: 1923 Jan 01-1927 Dec 31
Held by: The National Archives, Kew
Legal status: Public Record(s)
Closure status: Open Document, Open Description

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