The Wang 450 desktop calculator is one of the last large calculators made by Wang. The 400 family was the last series of calculators made by Wang and the 450 Scientific is one of the series.
Wang 450 Desktop
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HP-41CX Calculator
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Casio Watch Calculator CA-501
This pair of Casio watch calculators were manufactured sometime in the 1980s. They are models CA-501 and CA-502.
HP-41 Blanknut
The HP-41 Blanknut version is a variant of the HP-41CV made by HP for customers who needed to sell the calculator bundled with their own software.
Woodstock Calculator Battery
The battery for a Woodstock calculator contains two rechargeable AA flat top cells. The batteries were produced by HP until sometimes in 1980s so by the year 2021 the youngest one is well past its prime at a venerable 40+ years of age. It is not difficult to refurbish them.
HP-35 Red Dot
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HP-42C Prototype from HP-41CX
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