Cylinder Head Temperature Indicator Dual Engine Type B-11 WWII P-38, B-25, B-26 PV-1 Ventura Heading Pointer

Heading Pointer

F-89 Scorpion

This periscope appears to be new old stock

A photocopy of the manual is included

The loop itself is 9 inches diameter

Cylinder Head Temperature Indicator Dual Engine Type B-11 WWII P-38, B-25, B-26 PV-1 Ventura Heading PointerThis is an exceptional example of a Cylinder Head Temperature Indicator, Type B 11, for dual engine aircraft of the US Army Air Corps during WWII. The indicator displayed cylinder head temperature for left and right engines simultaneously, from 0 350 deg C via dual thermocouple. The letters AC US ARMY are embossed on its face, and the data label shows a serial number prefix of AC 42, evidence of a manufacturing year of 1942. The B 11 indicator was