Edouard Heuer, great grandfather of Jack Heuer who invented the Mikrograph in 1916, capable of timing to 1/100th of a second

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Edouard Heuer, great grandfather of Jack Heuer who invented the Mikrograph in 1916, capable of timing to 1/100th of a second

Edouard Heuer, great grandfather of Jack Heuer who invented the Mikrograph in 1916, capable of timing to 1/100th of a second

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