Ordnance Release Control-Intervalometer, Type AN-B3, USN Mark K2 Hunter but with markings for engines

but with markings for engines 1 & 2 or L & R

We might assume that this accelerometer was used in test aircraft by Rolls Royce engineers stationed at Hucknall

Measures approximately 5 inches square

including bombers B-17

This Turn and Slip Indicator Type MD-4A

Ordnance Release Control-Intervalometer, Type AN-B3, USN Mark K2 Hunter but with markings for enginesThis is an authentic WWII era Bomb Release Control as used in bomber aircraft of the US Army Air Force and US Navy. This example is a US Navy Mark K2. The Bomb Release Control (Intervalometer) permitted a bombardier to control the number of bombs dropped per release and their impact spacing. This would be used to set up a carpet bombing run, for example, over a large railroad marshalling yard, vs a more concentrated drop over a specific site such as a