B-29 Superfortress Mechanics Handbooks (2) P-80 and fighter P-61 Black Widow

and fighter P-61 Black Widow (according to the US Army Air Force's Maintenance Interchangeability Chart dated Feb 1945)

This interesting device appears to be a WWII-era or post-war Airspeed Analytical Instrument

Here is an original pre-WWII hard copy of the Handbook of Operation and Flight Instructions for the US Army Air Corps' Boeing B-17B Flying Fortress bomber

This is the Observer's Turn Controller in the Cold War-era USAF B-47 Stratojet strategic bomber

This is an Altimeter used in military aircraft of the US Navy either during or post WW1

B-29 Superfortress Mechanics Handbooks (2) P-80 and fighter P-61 Black WidowHere are two pocket reference manuals for mechanics servicing the WW B 29 Superfortress Bomber. One 70+ page handbook, measuring ~ 5 inches by ~6 inches, was printed in Nov 1944 and reviews the basic mechanical preventive maintenance checks and lists the technical orders for all other procedures and systems. The second (blue), measuring ~4 inches by ~7 inches, is a 38 page photocopy covering basic troubleshooting. This listing is for both pocketbooks.