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Double Roller For Balance-escapements Patent Print Patent Title: Double Roller For Balance-escapements Inventor Name: Frank J. Reaves...read more
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Double Roller For Balance-escapements Patent Print Patent Title: Double Roller For Balance-escapements Inventor Name: Frank J.
Reaves Year Issued: September 29 1903 Item Number: 11494 Reprint of original Patent Patent is printed on premium.
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Reaves Year Issued: September 29 1903 Item Number: 11494 Reprint of original Patent Patent is printed on premium.
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