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HP 41 c 02HP 41 c 00Model: HP-41C
Battery: 
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Year: 1979
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Info: The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities. Later came the HP-41CV and HP-41CX, offering more memory and functionality

WIkepedia HP-41C