Altimeter, Sensitive, 35,000 ft, Type KB 31/01 P-61 This is a rare find

This is a rare find

The Air Force US Army was the predecessor to the US Air Force

which would be rotated to align with the compass card floating in the reservoir below it

Here is a fine specimen of a mechanical 8-day Aircraft Clock Type A-13A-1

This is Torquemeter Gage

Altimeter, Sensitive, 35,000 ft, Type KB 31/01 P-61 This is a rare findHere is an Sensitive Altimeter, made by Kelvin Bottomley & Baird aka KBB Instruments, under license from Kollsman, Type KB 31 01. This sensitive altimeter displayed altitude using 3 pointers. The first and longest indicated 100's of feet, and the second indicated 1000's of feet. Ten thousands of feet were indicated by a third and smallest pointer. The knob adjusts the altimeter to the barometric pressure as displayed in the small inset window. It is