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comptator 03

Technical Featurescomptator 02
Manufacturer: Hans Sabielny Comptator 
Year:1922 
Info: Hans Sabielnys Comptator Schubert & Salzer, Dresda from 1909 SN 2079 pice 1925  105 RM. 
Addition, 9 digits Ten's complement subtraction Pen operation Moving racks Counter Lever for clearing entries, lockable Knob for clearing results