Electromechanical calculating machines from the 1960's
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Rotary calculators

Printing calculators
Friden 1217
Lagomarsino Totalia S4GT
Marchant 416-S
Monroe 570
Monroe 580
Monroe Mach 1.07
Monroe PC-1421
Olivetti Divisumma 26
Olivetti Logos 27-2
Olivetti Tetractys
Precisa 166
Victor 73-85-54
Victor 79-88-54
Victor 10-871
Walther Diwa 32

Mechanisms

Glossary

Other calculating devices

References and links

Acknowledgements

Wanted

 
Olivetti Divisumma 26        
 
Manufacturer
  Ing. C. Olivetti & Co., S.p.A.
Ivrea, Italy
 
Mechanism
  oscillating rack
 
Capacity
  13
 
Years produced
   
 
Price when new
  $575 in 1970, $495 in 1971
 
Size (W x D x H)
  in.
cm.
 
Weight
  lb. oz. (kg)
 
Features
  shortcut multiplication
back transfer
  click on photo to enlarge    
         
Evolution of the Divisumma 24, which was perhaps the largest selling single model of calculating machine (1 million units by 1967). Ettore Sottsass.