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Rockwell 9TR

Rockwell 9TR
Image: Joe Haupt, CC BY-SA 2.0

The Rockwell 9TR is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V. The calculator was manufactured in Mexico. Note: Rockwell 8R

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys18
Precision8
LogicAlgebraic
Display typeLED
Length155mm
Width76mm
Thickness23mm
Weight122g
Power SourcePP3 9V
CountryMexico
Year introduced1975
Year discontinued1976

Replacements:

If you have a Rockwell 9TR that is no longer working, you can first try replacing the PP3 9V battery. 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 Rockwell