Pilot's and Flight Engineer's Notes Halifax III & IV, AP1719C&G-PN MiG-21 see the illustrations of the

see the illustrations of the location of this gyro on the instrument panels of the F9F-5 and the HUP-1 from their flight manuals

as the case has a label as a torque indicator

aka Barr & Stroud model GJ3

Prior to the torpedo run

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

Pilot's and Flight Engineer's Notes Halifax III & IV, AP1719C&G-PN MiG-21 see the illustrations of theThis 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.