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Books by Publisher: Roberts Publishing

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American Horologist and Jeweler October 1972 ( In Competition--What Price Gold, Parts in Count Wheel Clocks Need Identifying WHen Setting Strike, Selectrons, Ltd. Slide-Rule Speeds Selective Plating Process)
🇺🇸 United States
American Horologist and Jeweler October 1972 ( In Competiti…
By: Orville R. Hagans (Editor)
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American Horologist and Jeweler June 1955 ( Determining Mainspring Pull, Setting a Calendar Clock, Oiling Patek-Philippe Winder)
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American Horologist and Jeweler June 1955 ( Determining Mai…
By: Orville R. Hagans (Editor)
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American Horologist and Jeweler March 1969 (Hellmut-Kienzle Clock and Watch Museum Black Forest, Germany; Pin-Lever Escapement)
🇺🇸 United States
American Horologist and Jeweler March 1969 (Hellmut-Kienzle…
By: Orville R. Hagans (Editor)
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American Horologist and Jeweler March 1972 ( One-Way Rotor Vs. Two-Way Rotor, Edward Ingraham Tribute, Unusual and Complicated Watches Part 4)
🇺🇸 United States
American Horologist and Jeweler March 1972 ( One-Way Rotor …
By: Orville R. Hagans (Editor)
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American Horologist and Jeweler May 1960: Bright Gold Plating
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American Horologist and Jeweler May 1960: Bright Gold Plati…
By: Orville R. Hagans (Editor)
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American Horologist and Jeweler July 1972 ( All Types of Electronic Watch Movements Are Included in Swiss Line, Diamonds--Accenting Africa, Train Counts and Beat Rates Part 2, Unusual and Complicated Watches Part 8)
🇺🇸 United States
American Horologist and Jeweler July 1972 ( All Types of El…
By: Orville R. Hagans (Editor)
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