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Sperry Remington 661-D (661D)

Sperry Remington 661-D
Image: Joe Haupt, CC BY-SA 2.0

The Sperry Remington 661-D is an arithmetic calculator with 6 digits precision and algebraic logic. It has 5 functions, 18 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA. The calculator was manufactured in Japan. Note: 6 digit display, 12 digits internal precision

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys18
Precision6
LogicAlgebraic
Display typeVFD
Length153mm
Width80mm
Thickness35mm
Weight238g
Power Consumption0.500000W
Power Source4xAA
CountryJapan
Year introduced1973
Year discontinued1973

Replacements:

If you have a Sperry Remington 661-D that is no longer working, you can first try replacing the 4xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Sperry Remington