Talk:Tonewheel

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It looks like tonewheels were used in the Telharmonium that was invented in the 19th century, prior to the 1910 date claimed in this article. — Preceding unsigned comment added by 2A01:E35:8B10:A450:60D3:B913:3D06:9688 (talk) 14:34, 25 February 2019 (UTC)[reply]