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Aderes Column Adder

Aderes Column Adder - Adix Style Mechanical Adding Machine circa 1935?
 
The Aderes is a later variant of the famous Adix Calculator, which was made in Germany around the turn of the centruy, and the first calculator to use Aluminum (to reduce the weight). 
 
 
 
Here's a blurry video of the Aderes (note: audio is delayed slightly).

 
 
Here are a few sites with a bit of information about the Adix:
 
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