A slim report on German WW2 fluid flow-meters, widely used by the German Navy for oil meters for U Boats and Torpedo Boats, issued in small numbers by the British Intelligence Sub-Committee (BIOS), 1945.
10 x 7.5 inches, 25 x 19 cms. 7 pages mimeographed typewritten text including two large sketches. Staples a touchy rusty but sound.
Now sold - there are more original WW2 reports in Section E at UniqueOrRare.com.