This is a "New Old Stock" B-6A Fuel Mixture Indicator for a twin engine aircraft. It was originally manufactured by Cambridge Instrument Company in 1943 and could have been used on WWII aircraft like the B-25 Mitchell or an A-26 Invader. This instrument is in excellent condition and comes with a 4 page instruction pamphlet.
Find it along with many other aviation collectables in our Blaine store:
WWII World War II Aviation Airplane Aircraft Plane Collectable Mancave
do NOT contact me with unsolicited services or offers