Högfors calculator from the 1930s

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Description

Vintage tooth disks calculator from Sweden from around the 1930s.
The Hogfors is one of the lesser-known Swedish calculators. Although similar in appearance to an Odhner-type machine, it is only capable of addition and subtraction. Similar to Addac. Sales by AB Affärsystem.
200x135x130 mm. Weight about 2.1 kg.
Have instructions written on the bottom.
Very good condition.