FRE 11572

IMAGE

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Glycol boilers on a B-17 Flying Fortress. Image stamped on reverse: ' Flight.' [stamp], 'Passed for publication 14 Aug 1942.' [stamp] and '215600.'[censor no.] Printed caption on reverse: 'The glycol boilers in the exhaust collector which are used for cabin heating.'

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IWM, Roger Freeman Collection (uploaded May/2023)