Measuring Triangle (Meßdreieck) for German MG 34 and MG 42 Machine Guns Ki-61 Tony "REF 6AA/624" (which may be

"REF 6AA/624" (which may be an RCAF part number) and "CAT

AF US ARMY is embossed on its face

Turning the set course knob rotates the course dial to bring the desired track figure under the course index

Once past 12 o'clock position

Measuring Triangle (Meßdreieck) for German MG 34 and MG 42 Machine Guns Ki-61 Tony "REF 6AA/624" (which may beHere is a highly unusual and complicated instrument a German Medreieck (Messdreieck), or measuring triangle, used by MG 34 or MG 42 Machine Gun crews during WWII. The measuring triangle was used to optimize the fire efficiency of machine guns and to calculate distances. It may also have been used to support artillery aiming. We found a chatroom with the following information from "Roger": It resolves trig functions, but cannot directly calculate where