Ammunition Reserve Counter, B-36 Peacemaker P-3 Orion The detonator spring does trigger

The detonator spring does trigger the switch mechanically

According to its spec sheet from the Army/Navy Index of Aeronautical Equipment

loose-leaf unbound manual reviews the basic information as well as in-depth technical information on both instruments

M6 periscopes in each late model Sherman

The cover is printed in gold Cyrillic letters: DEVICE FOR CORRECTION OF FIRE

Ammunition Reserve Counter, B-36 Peacemaker P-3 Orion The detonator spring does triggerThis is a US Air Force, Cold War era electromechanical Ammunition Reserve Counter, used to display the rounds of ammunition remaining in reserve, up to 999 rounds, as the aircraft's guns have been fired. The wheel at the left of the digit display counter is used to set the total rounds loaded into the aircraft. The small protrusion right of the digit display counter was used to reset the counter to zero once pressed, but it is either non functional or