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https://strapchange.com/what-are-watch-jewels-what-does-21-jewels-mean/
What does “21 jewels” mean? As all watches have many moving parts, jewels were inserted to lessen the wear and tear on the bearings and other pivot points. Meaning all the rotating parts and other high frictional points in the watch; which before were metal againts metal parts, were exchanged with hard jewels.
https://www.etsy.com/market/21_jewels_watch
Vintage Men's Citizen 6650 Day Date 32mm Automatic 21-Jewels Wrist Watch A9335. FinewatchesCo. 4 out of 5 stars. (2) $15.00. Add to Favorites.
http://www.swiss-watches-guide.com/21-jewel-movement.html
A 21 jewel movement was – and still is - used to help keep the watch running smoothly. Tiny synthetic gem crystals are set between many of the gears, in order to reduce friction. These gems resist temperature better than metal, and hold lubricant much longer. Jewels are industrial-grade or synthetic rubies, which are used to make a watch ...
https://www.etsy.com/market/orient_21_jewels
Vintage Orient 3 Star Crystal Automatic 21 Jewels Japan Made Men's Wrist Watch. UNIQUE123WATCHES. $59.99 FREE shipping. Add to Favorites. vintage Orient Crystal 21 Jewels automatic watch made in Japan. Spare or repair. LuxuryitemsGB. 4.5 out of 5 stars. (49)
https://vintagecitizenwatches.com/tag/21-jewels/
Jun 20, 2015 · At 3 o’clock the watch has the day and date display inside a polished frame that connects the two parts of the dial. The usual Citizen logo is at 12 and at 6 it reads: “para 100m water, automatic, 21 jewels”. The movement is the 7270 calibre – simple, reliable, automatic with 21 jewels and beating at 21,600bph. As usual with Citizen ...
https://www.prestigetime.com/blog/what-are-the-jewels-in-a-watch-for.html
Jul 25, 2021 · A watch with 17 jewels is often called a fully jeweled watch. This means that it uses jewel (usually ruby) bearings in the mechanical movement from the balance wheel all the way to the center wheel pivot. What does 21 jewels mean in a watch? Similar to a 17-jewel watch that has a fully jeweled movement, but also has a few extra capstones added ...Estimated Reading Time: 6 mins
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