Number plate...what for ?

relicteurww2

Full Member
Joined
Mar 9, 2018
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Europe
Hallo all !
I found this alluminium plate number near abandoned military area. What it can calcul ? From what it can be ? Have somebody idea ?
 

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Lol true with degrees of navigation :-D
So... calculator of air pressure ... I will search somethink about, thanx for tip :-)
 
I was going to suggest a radian scale, but the numbers don't seem to add up. (Thought maybe it was a "degree" wheel off a larger military gun or morter.)
Maybe a degree wheel from a heating device? (Tempering oven, kiln, etc.)

Roger
 
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