Naval Aircraft Instrument Handbook, NAVAER 05-1-568, 1944 Nick Fighter early versions of the P-47

early versions of the P-47 Thunderbolt

This appears to be a post WWII Direct Reading Aperiodic Compass used at the navigators station in US military aircraft

The dial markings are clear and the case is intact

right side

at work and the peasantry

Naval Aircraft Instrument Handbook, NAVAER 05-1-568, 1944 Nick Fighter early versions of the P-47Here is an original WWII era Naval Aircraft Instrument Familiarization and Inspection Handbook, NAVAER 05 1 568, published in 1944 by the US Navy Bureau of Aeronautics. The 8. 5 by 11 inch manual is divided into 3 sections: Section 1 Flight Instruments 94 pages Section 2 Power Plant Instruments 71 pages Section 3 Navigation Instruments 75 pages Each section contains several pages on each instrument, describing its use, function, operation, and