Ordnance Release Control-Intervalometer, Type AN-B3, USN Mark K2 Hunter type B-9C (formerly AN5772-2) and

type B-9C (formerly AN5772-2) and made by US Gauge

This Turn and Slip Indicator Type MD-4A

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

including bombers B-17

Ordnance Release Control-Intervalometer, Type AN-B3, USN Mark K2 Hunter type B-9C (formerly AN5772-2) andThis 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