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Teardown (partial) of a Facit C1-13 13 digit mechanical calculator from 1967. John Wolff’s mechanical calculator website: http://www.johnwolff.id.au/calculators/Tech/FacitC1-13/C113.htm
Forum: https://www.eevblog.com/forum/blog/eevblog-1332-facit-mechanical-calculator/
