Ignition Switch Type B-6 Dual Engine WWII F6F Hellcat Here is a Rapid Response

Here is a  Rapid Response Rate of Climb / Vertical Speed Indicator

part of a Probe and Drogue refueling system

Truth be told

also labeled with an Allison Engine part number 6734355A

the A-2 indicator was used in early versions of fighter P-47 Thunderbolt (see image of the P-47 instrument panel from its flight manual dated 1943) and transport C-46 Commando

Ignition Switch Type B-6 Dual Engine WWII F6F Hellcat Here is a Rapid ResponseThis is a WWII era Ignition Switch Assembly, US Army Air Force Type B 6, for a dual engine aircraft, made by Bendix Scintilla for Delco Aviation, part number 10 30910 1. The B 6 ignition switch has two switches, one each for the left and right engine, and a master switch in the center. The master switch is switched by pulling (ignition off) or depressing (ignition on) the center post, intending to be able to kill both engines simultaneously. The knob