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2. Chinese standard movement - Wikipedia

   en.wikipedia.org/wiki/Chinese_standard_movement

   The project to establish the Standard watch originally aimed to make a steel-cased 17 jewel watch available to, and within the means of, almost any worker in the People's Republic of China. The often elaborate case-backs and signed crowns of many vintage Standard watches are a testimony to the pride of the local enterprises that built them.

3. US military watches - Wikipedia

   en.wikipedia.org/wiki/US_military_watches

   October 17, 1962 [2] The B revision was meant to provide a single standard for a 17 jewel watch with a life of at least two years. [2] It required the 1.40″ metal case and all metal pieces be protected by a finish or preservative, except parts which would be adversely effected if so treated.

4. 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

5. 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 ...

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. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   205.911 (the most commonly available movement having 17 jewels and often ordered in gold plating) 205.914 (no information available from ETA) 205.961 (a 205.911 with the addition of a GMT hand) 206.211 (a 205.911 fitted with a Dubois Depraz 2021 to make a chronograph. With 53 jewels the most jeweled quartz movement ever made)