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Olga Gray and the Woolwich Arsenal Spy Ring
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Catalogue reference: AVIA 16/19
This record is about the Test of A.R.K. gyroscopes 1:1 ratio dating from 1937 in the series Air Ministry and successors: Aircraft Torpedo Development Unit: Reports and Technical.... It is held at The National Archives, Kew.
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Test of A.R.K. gyroscopes 1:1 ratio
AVIA 16
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Test of A.R.K. gyroscopes 1:1 ratio
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