Pilot's and Flight Engineer's Notes Halifax III & IV, AP1719C&G-PN MiG-21 It has the original crown

It has the original crown symbol of the Air Ministry on the back

The knob rotates the face of the instrument to correct the scale

Would be a terrific addition to any collection of Cold-War-era aviation memorabilia

that illustrated speedometer does show a tripmeter so it only goes to assume that it had to have a reset knob like the one in our example

Pilot's and Flight Engineer's Notes Halifax III & IV, AP1719C&G-PN MiG-21 It has the original crownThis is a post WWII Air Data Publications reprint of the October 1944 Air Ministry Publication. Includes checklist, airplane handling, emergencies, foldouts of cockpit pictures and instrument panel. This ~50 page black and white manual is in very good condition. Measures 7. 5 inches long and 5 inches wide.