B-29 Superfortress Service School Manual AR-234 25 inches across by 3

25 inches across by 3 inches deep

point the sight up (90 deg) or down (-5 deg)

AeroAntique acquired this purported Luftwaffe aircraft crash relic several years ago

Here is an early WWII-era Vertical Speed (Rate of Climb) Indicator made by Kollsman

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B-29 Superfortress Service School Manual AR-234 25 inches across by 3This is an authentic WWII era compilation of original student training instructions for servicing the US Army Air Force Boeing B 29 Superfortress heavy bomber from the Academic Department of the Amarillo Army Air Field . This 1. 5 inch thick manual contains a collection of training instructions from 1944 and 1945 for select systems of the B 29, including air frames, ventilation, engines, hydraulics, electrical, etc. This was a personal compilation of