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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. List of ETA Movements - Wikipedia

   en.wikipedia.org/wiki/List_of_ETA_Movements

   ETA Mechanical movements Caliber Product Line Winding Diameter () Height () Jewels Frequency Running time () VPH Hz; 2671 [1]: Mecaline automatic 17.2 4.8 25

4. Jewel bearing - Wikipedia

   en.wikipedia.org/wiki/Jewel_bearing

   Ruby jewel bearings used for a balance wheel in a mechanical watch movement Cross-section of a jewel bearing in a mechanical watch. This type of donut-shaped bearing (red) is called a hole jewel, used for most of the ordinary wheels in the gear train. It is usually made of synthetic sapphire or ruby, press-fit into a hole in the movement's ...

5. Shock-resistant watch - Wikipedia

   en.wikipedia.org/wiki/Shock-resistant_watch

   In a mechanical watch, it indicates that the delicate pivots that hold the balance wheel are mounted in a spring suspension system intended to protect them from damage if the watch is dropped. One of the earliest and most widely used was the Incabloc system, invented in 1934. Before the widespread adoption of shock-resistant balance pivots in ...

6. Hamilton Watch Company - Wikipedia

   en.wikipedia.org/wiki/Hamilton_Watch_Company

   The Hamilton Watch Company was housed on a 13-acre (53,000 m 2) complex in Lancaster. Hamilton took possession of Aurora Watch Company's machinery shortly after incorporation. [citation needed] The first watch made under the Hamilton name was an 18-size 17-jewel pocket watch in 1893.

7. Pearl Harbor Day: See photos of the attack that brought the ...

   www.aol.com/news/pearl-harbor-day-see-photos...

   A sign reading: 'I AM AN AMERICAN', on the Wanto Co grocery store at 401 - 403 Eighth and Franklin Streets in Oakland, California, the day after the attack on Pearl Harbor, 8th December 1941.