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



Other calculating devices

References and links



Friden SVE        
  Friden Inc.
San Leandro, California, USA
  stepped drum
  10 x 11 x 20
Years produced
Price when new
  $975 in 1965
Size (W x D x H)
  lb. oz. (kg)
  automatic decimal point placement
shortcut multiplication
  click on photo to enlarge    
Originally used by the Oregon Bureau of Land Management. Ambitious shortcut multiplication and automatic decimal point management. The number of digits after the decimal had to be preselected using a knob on the left side of the machine. The multiplier keypad had its own decimal point key. There was one other V-line Friden, the SVJ, which was an SVE with back transfer. Improvements for servicing – carriage flips up, outer panels easily removed. Rushed to market, crippled by a main drive shaft that was undersized and prone to bending, all the V-line were recalled after only a year of production. They were later reintroduced with a different color scheme as the R-line, with this machine becoming the RSC. (Bodley, Fridenites)