Fuel Quantity Totalizer, 230,000 lbs, B-52 Stratofortress USAF Liaison Aircraft The compass pointer is slightly

The compass pointer is slightly sticky as it rotates

and the markings on the face are in place (yet changing color from the many years) and unblemished

Air Corps US Army Type C-14 (also AN-5761-1)

This periscope appears to be new old stock

It may be some sort of a stall warning instrument

Fuel Quantity Totalizer, 230,000 lbs, B-52 Stratofortress USAF Liaison Aircraft The compass pointer is slightlyHere is a very cool Fuel Quantity Totalizing Indicator for a USAF Boeing B 52 Stratofortress. A totalizing indicator displayed the total fuel available in all of the fuel tanks within the aircraft (usually without including any supplemental tanks e. g. drop tanks). There were separate fuel quantity gauges for each fuel tank or pair of tanks. The maximum capacity displayed on the indicator is 230,000 lbs, or ~35,000 gallons. This aligns with the total