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Olga Gray and the Woolwich Arsenal Spy Ring
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Catalogue reference: HW 3/176
This record is about the German code book 13040, used inter alia for encoding Zimmerman message. Transferred... dating from 1916-1917 in the series Government Code and Cypher School and predecessors: Personal Papers, Unofficial Histories,.... It is held at The National Archives, Kew.
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HW 3/176
1916-1917
German code book 13040, used inter alia for encoding Zimmerman message. Transferred from HW 7/9 in August 1995
4186
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HW 3
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Records created or inherited by Government Communications Headquarters (GCHQ)
Government Code and Cypher School and predecessors: Personal Papers, Unofficial Histories,...
German code book 13040, used inter alia for encoding Zimmerman message. Transferred...
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