Uploaded October 2020 | Updated September 2026, 1 hour ago

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The Chadwick Mini-Calculator and the Neckermann Haushaltkalkulator are rebranded versions of the Solo Handy Calculator. It was made in Japan in the late 1960s and early 1970s.

For more information on this and other calculators in my collection, visit my website:
jaapsch.net/mechcalc

0:00 Introduction, History
1:34 Addition
2:24 Subtraction
2:42 Clearing
2:55 Outro