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How many harmonicas has the German company Hohner made since 1857?

1 billion
harmonicas
1,000,000,000 exactly, give or take
Hohner has made over a billion harmonicas since 1857 — enough for one in every eight people alive today, making it arguably the best-selling instrument in history.SOURCEHohner company records
Scale check: 1 billion is roughly 1 in 8 people on Earth.
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