ROYAL AIR FORCE 1939-1945: BOMBER COMMAND - Sergeant W Sinclair, RAF, and Flying Officer E H Giersch, RAAF, of No 463 Squadron at Waddington, test their oxygen masks in the crew room before an operational sortie, April 1944 Sinclair, W, Giersch, Eric Heinrich, Royal Air Force, Maintenance Unit, 92, Royal Australian Air Force

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Photo credit: © piemags/ww2archive / Alamy / Afripics
License: Licensed
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