Electromechanical calculating machines from the 1960's
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Rotary calculators
 Badenia VA-17
Badenia VARE-17
Bohn Contex 55
Cellatron R44SM
Diehl DSR-18
Diehl VSR-18
Facit CA1-13
Friden SBT
Friden SVE
Friden SRW
Friden SRQ
Friden RSR
Hamann 505
Madas 20 BTG
Marchant ABL
Marchant SKA DeciMagic
Marchant Tenkeymatic
Monroe IQ-213
Olympia RA-16
Soemtron 214

Printing calculators

Mechanisms

Glossary

Other calculating devices

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Acknowledgements

Wanted

  
Marchant SKA DeciMagic        
 
Manufacturer
   Smith-Corona-Marchant Inc.
Oakland, California, USA
 
Mechanism
   proportional gear
 
Capacity
   10 x 10 x 20
 
Years produced
    
 
Price when new
   $985 in 1964
 
Size (W x D x H)
   in.
cm.
 
Weight
   lb. oz. (kg)
 
Features
   1300 rpm cycle speed
automatic decimal point placement
  click on photo to enlarge    
         
The pinnacle of the Marchant rotary calculator line was the Single Keyboard Automatic (SKA) also known as the DeciMagic. The proportional gear mechanism and high cycle speeds of the standard Marchant were kept for this machine. A control register was added at the front of the keyboard to make this model, and its successor, the nearly identical Model SK, the only fully-automatic Marchant rotary calculators. This model featured automatic decimal point placement, which was facilitated by the single keyboard for all entries. Joseph Sinel. Los Alamos.