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Catalogue reference: AVIA 19/692
This record is about the Free 20 m.m. Hispano gun in Sunderland flying boat bow dating from 1942 in the series Air Ministry and successors: Marine Aircraft Experimental Establishment: Reports. It is held at The National Archives, Kew.
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Free 20 m.m. Hispano gun in Sunderland flying boat bow
AVIA 19
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Free 20 m.m. Hispano gun in Sunderland flying boat bow
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