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Last Updated: September 18, 2026
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In this Unlocking the Vault episode, you'll get a closer look at the Description of the small adding Reuters Calculator demonstrated by Don Brown of Wisconsin. For sale at auction on December 14, 2016. Antique mechanical calculator demo (brief!). Visit RetroCalculators.com. Something slightly different today: I bought a simple mechanical calculator! Fun little thing. I thought you folks might to know ... The Sterling Dial-A-Matic adding Here I show a Golden Gem chain adder from 1912. See my collection of mechanical calculators on my site: ... I put in the lowest bid. I thought it was the
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