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Olga Gray and the Woolwich Arsenal Spy Ring
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Catalogue reference: HW 25/35
This record is about the Morsex (Phantom), plans for a morse secrecy apparatus dating from 1932 Jun 14 - 1947 Jun 30 in the series Government Code and Cypher School: Cryptographic Studies. It is held at Creating government department or its successor.
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Not at The National Archives, but you may be able to view it in person at Creating government department or its successor.
HW 25/35
1932 Jun 14 - 1947 Jun 30
Morsex (Phantom), plans for a morse secrecy apparatus
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Closed Or Retained Document, Open Description
HW 25
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Government Code and Cypher School: Cryptographic Studies
Morsex (Phantom), plans for a morse secrecy apparatus
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