Anti-Aircraft Artillery Range Indicator, US Navy, Mark 1, 1944 Cold War Our Elgin A-8 has definitely

Our Elgin A-8 has definitely seen a bit of service

The glass is clear and the lettering distinct

the year when the Honeywell C-1 system became the standard autopilot system for large multi-engine aircraft

The B-7 Engine Gage Unit displayed 3 metrics with one instrument:  Oil temperature (from 0-100 deg C)

This indicator

Anti-Aircraft Artillery Range Indicator, US Navy, Mark 1, 1944 Cold War Our Elgin A-8 has definitelyHere is a WWII USNavy Range Indicator, Antiaircraft Gunnery, Mark 1. It is a hand held finder used to ascertain the range of an enemy aircraft based upon its known wingspan. They were only as accurate as the observers knowledge of aircraft identification and of course, how rapidly he could spot, identify, track and calculate the information to pass this on to the gunners (usually manning 20mm to 40mm guns or a 3" gun mount typically used on auxiliary