Brake Pressure Indicator, Dual, MiG-17 Fresco Fighter, USSR
Here is Dual Brake Pressure Indicator from the Cold War-era MiG 17 Fresco jet fighter of the USSR Air Force. It's design is very interesting in that the pressure scales are opposite one another. See photo showing the indicator on the left side console of the MiG 17 cockpit.
It is in exceptional condition given its age. Measures ~2 inches diameter and ~2 inches deep.