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

References and links

Acknowledgements

Wanted

 
Diehl VSR-18        
 
Manufacturer
  Diehl G.m.b.H.
Nürnberg, Germany
 
Mechanism
  stepped drum
 
Capacity
  11 x 8 x 17
 
Years produced
  1962 to 1964
 
Price when new
  DM 4700 ($1180) in 1964
 
Size (W x D x H)
  in.
cm.
 
Weight
  lb. oz. (kg)
 
Features
  visible memory register
back transfer
shortcut multiplication
  click on photo to enlarge    
         
Last rotary calculator from Diehl, incorporating a new fully automatic shortcut multiplication mechanism. A steel band runs around the perimeter of the machine to couple the carriage position to the multiplication mechanism. This is arguably the most advanced rotary calculator ever produced. visible memory, back transfer. (Reese)