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  2. Incabloc shock protection system - Wikipedia

    en.wikipedia.org/wiki/Incabloc_shock_protection...

    Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.

  3. Gallet Clamshell - Wikipedia

    en.wikipedia.org/wiki/Gallet_Clamshell

    1939 advertisement from Jewelers' Circular Keystone magazine of the Gallet MultiChron 30 "Clamshell", the world's first water resistant chronograph wristwatch Reverse view of the Gallet Clamshell showing the 4 screws that compress the 2 part case around the flared acrylic crystal Open view of the Gallet Clamshell showing top part of the two part case and complex Swiss column wheel movement ...

  4. Watchcase - Wikipedia

    en.wikipedia.org/wiki/Watchcase

    A case for a pocket watch, 1870. The outer clamshell protects the watch. The inner layer contains a glass window. The ring is for the attachment of a chain. A usually metal clamshell case for a mechanical watch, [1] common until the early twentieth century. It is meant to sit around the inner case of the watch. [2]

  5. Joseph Fahys & Co. - Wikipedia

    en.wikipedia.org/wiki/Joseph_Fahys_&_Co.

    The Fahys Watch Case Co Factory in Sag Harbor 1878. The founder of the company, Joseph Fahys, was born on May 28, 1832, in Belfort, France. [3] In 1848, Fahys emigrated from France to the United States with his mother. He was apprenticed to Ulysses Savoye, of West Hoboken, New Jersey, who was one of the two first watch case makers in the United ...

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