Altimeter, Sensitive, 35,000 ft, Type KB 31/01 P-61 The Eugene M

The Eugene M

A graduated rotatable ring (verge)

and also contains an anchoring hole for an HF wire antenna support

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

Altimeter, Sensitive, 35,000 ft, Type KB 31/01 P-61 The Eugene MHere 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