Cylinder Head Temperature Indicator Dual Engine Type B-11 WWII P-38, B-25, B-26 PV-1 Ventura The loop itself is 9

The loop itself is 9 inches diameter

This French altimeter

so the ball glides but not in fluid

This is an fine example of the WWII-era mechanical 8-day Soviet aircraft chronograph clock

Cylinder Head Temperature Indicator Dual Engine Type B-11 WWII P-38, B-25, B-26 PV-1 Ventura The loop itself is 9This 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