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https://pocketwatchdatabase.com/reference/jewels
Pocket Watch Jewels Jewels are hard minerals added to the mechanics of the watch to prevent wear at pivot and collision points. Generally, the jewel count is a direct indicator of overall quality. The standard jeweling configurations for conventional movements are described below.
https://www.pocketwatches.com/blog/what-are-pocket-watch-jewels/
A pocket watch jewel is an item added to the mechanism of the watch to provide a smooth, long-lasting surface that increases the efficiency of the timepiece. Their main purpose is to reduce friction which could impact the running of the watch.
https://mb.nawcc.org/wiki/Pocket-Watch-Jewels
Apr 25, 2009 · The jewels in a watch were, for the most part, the bearings. These were industrial jewels, not at all gem quality. They provided hard, low-friction, wear-resistant surfaces. The jewels are very hard and resist scratching and wear.
http://www.barrygoldberg.net/watchguide/jewels.htm
the regular "hole" jewels to prevent the arbor from moving up and down, and most watches also have a few special jewels [called "pallet" and "roller" jewels] as part of the escapement. Very early pocket watches rarely had jewels, simply because the concept hadn't
https://www.prestigetime.com/blog/what-are-the-jewels-in-a-watch-for.html
Watches are no different and also use bearings and these bearings that are found in the higher-end automatic and hand-wound watches are made out of jewels. These precious stones are smooth and don't allow much friction and are therefore used in order to make the movement of these metal and precious metal gears easier.
http://www.pocketwatchrepair.com/how-to/seven-jewel.php
In a jeweled lever watch, the first seven jewels employed in the construction of the watch are (typically): 2 balance hole jewels, 2 balance cap jewels, 2 pallet jewels, and one impulse (or roller) jewel; that is the jewel arrangement you'll find on virtually every seven-jewel pocket watch.
https://quillandpad.com/2018/06/29/the-number-of-jewels-in-a-watch-movement-indicates-value-doesnt-it-a-myth-debunked/
Jun 29, 2018 · The jewels that we use in watches today and decades past are synthetic, the most common being synthetic ruby. These jewels are grown in a controlled environment as something called a boule, the French word for a cone-shaped chunk of the material.
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