Airspeed Indicator, Sensitive, 700MPH, Type AN5862-W2, US Army Air Force, WWII F3D Skyknight and one adjustment knob

and one adjustment knob

very early indeed

This is a WWII-era aircraft Oxygen Regulator Type A-9A as used across bomber and transport aircraft of the US Army Air Force and US Navy

an innovation developed by MIT

Airspeed Indicator, Sensitive, 700MPH, Type AN5862-W2, US Army Air Force, WWII F3D Skyknight and one adjustment knobThe Army Type AN5862 Airspeed Indicator (also called type F 1A) was used across a number of US Army Air Corps and Air Force aircraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. It was also used in versions of US Army Air Force WWII fighters P 38, P 39, P 40, P 47, and P 51. This F 1A was made by Kollsman, part