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Inside the Watch: Balance Wheel

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Balance Wheel from Illinois Watch Co. Grade 61 - 18-Size, Model 6, 17 Jewels, c.1900, Serial No. 1521597
Balance Wheel from Illinois Watch Co. Grade 61 – 18-Size, Model 6, 17 Jewels, c.1900, Serial No. 1521597


A closer look at the balance wheel and Breguet hairspring from an Illinois Grade 61 movement.⠀

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