Airspeed Indicator, 430 Knots, R88-I-350-25 A-35 Vengeance connecting to the ground-breaking system

connecting to the ground-breaking system known as SAGE - Semi-Automated Ground Environment

How it might have been affixed to the case or to the timepiece is not obvious to us

The B-29 bomber was the first production bomber aircraft to use a central fire control system

and can therefore be centered on the index mark in the sighting tube

Airspeed Indicator, 430 Knots, R88-I-350-25 A-35 Vengeance connecting to the ground-breaking systemHere is an Air Speed Indicator as used in WWII era and post WWII era aircraft of the US Navy such as the F4U Corsair fighter (see illustration of the F4U instrument panel from its flight manual dated 1944 showing its location). It was also used in USN Fighters F6F Hellcat and F7F Tigercat, as well as Torpedo Bomber TBM Avenger and patrol bombers PBY 5 Catalina and PBM 5 Mariner, among others. On this style of air speed indicator, speed between 0 200