Details

Two items. Item 1 – Eight A4 typed sheets from the Public Records Office titled ‘Transcription of a hand-written document contained in file AV1A 12/137, Most Secret, The proposed radio method of Aeroplane detection and its prospect [by Watson Watt]’. Item 2 – Seventeen A3 photocopied handwritten sheets from the Public Records Office ref. AV1A 12/137 and X/P 02634 titled ‘Most Secret, The proposed radio method of Aeroplane detection and its prospect [by Watson Watt]’.