Issued in small numbers by the British Intelligence Sub-Committee (BIOS), 1946, following a report by the US Field Technical Agency (FIAT).
The significant feature of the Magnetophon system was that recording was done on an innovative plastic tape impregnated or coated with microscopic particles of magnetic material. 10 x 7.5 inches, 25 x 19 cms. 43 pages mimeographed typewritten text including photographs, charts and circuit diagrams.
Now sold - there are more original WW2 reports in Section E at UniqueOrRare.com.