A collection of four 78 r.p.m. gramophone records issued by the Air Ministry marked 'For Official Use Only' including Take Off Lancaster Parts 1 and 2; Normal Fighter Attacks & Sudden Fighter Attacks; The Bombing Run; Mountain Warning Signal; Lancaster Landing and Overshooting. (4)

細節
A collection of four 78 r.p.m. gramophone records issued by the Air Ministry marked 'For Official Use Only' including Take Off Lancaster Parts 1 and 2; Normal Fighter Attacks & Sudden Fighter Attacks; The Bombing Run; Mountain Warning Signal; Lancaster Landing and Overshooting. (4)