Wheel and Flap Position Indicator, Type A-2 U-2 This is an original 3-box-set

This is an original 3-box-set collection of pages for Recognition Manuals published by the US Navy's Office of Naval Intelligence in 1942-43

but not bad for a document that is over 60 years of age

It is specifically a Climb and Descent Tabulator

Here is an aerial refueling nozzle

Here is a British Altimeter Mk XVIIA

Wheel and Flap Position Indicator, Type A-2 U-2 This is an original 3-box-setThis is a WWII era Wheel and Flap Position Indicator, Type A 2, as used in aircraft of the US Army Air Force and US Navy with tail wheel landing gear. According to the Maintenance and Interchangeability Chart dated Feb 1945, the A 2 indicator was used in early versions of fighter P 47 Thunderbolt (see image of the P 47 instrument panel from its flight manual dated 1943) and transport C 46 Commando. It was also used in the fighter P 40F Warhawk