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https://www.thewatchsite.com/threads/21-vs-23-jewel-watches.9288/
Oct 09, 2010 · The jewels don't determine the accuracy of the watch. Typically the 7s26 (21 jewels) and the 7s36 (23 jewels) have the same exact accuracy spec of -15/+25 seconds per day or thereabouts. Accuracy in a mechanical watch is more of a function of how it is regulated and adjusted (or not) at the factory for postional variance and temperature.Estimated Reading Time: 2 mins
https://strapchange.com/what-are-watch-jewels-what-does-21-jewels-mean/
As for the referenced watch above (Seiko 5 Snk809), which has one of Seiko´s highly used and robust movements (the 7S26), there are 21 jewels inside. I assume Seiko use synthetical jewels and that they have made many attempts, in trying to create the best movement, with the most optimal amount of jewels …
https://mb.nawcc.org/threads/21-vs-23-jewel.139774/
Jan 24, 2017 · Jan 21, 2017. #7. To answer your specific question then yes a 23 jewel movement will always demand a higher price than a 21 jewel, and a 24 jewel will be higher than a 23 jewel. However unless you're buying orphan movements you must consider the size, dial type, hands, small differences in grade, and case material too.
https://donghohaitrieu.com/tin-tuc/dong-ho/so-sanh-dong-ho-seiko-5-automatic-21-jewels-va-23-jewels-dau-la-khac-biet.html
Feb 02, 2019 · – – – Seiko có một thông báo chính thức về việc máy Seiko 7S36 (23 jewels) sẽ bền hơn máy 7S26 (21 jewels), họ chỉ rõ: 7s26 sẽ hoạt động trong 10-20 năm mà không cần bảo dưỡng, 7s36 có thể kéo dài 12-22 năm mà không cần bảo dưỡng.Reviews: 2
https://www.prestigetime.com/blog/what-are-the-jewels-in-a-watch-for.html
Jul 25, 2021 · 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 which are used to reduce positional errors.Estimated Reading Time: 6 mins
https://calibercorner.com/seiko-caliber-7s26/
The 7S26 has 21 jewels and the 7S36 has 23 jewels. Many enthusiasts refer to this as 2 non working jewels. There is speculation that the 7S36 was supposed to eventually replace the 7S26, but that never actually happened. WUS user Biased&Critical explains the comparison in detail: The extra 2 jewels are on the “lower bridge for 3rd wheel and ...
http://www.swiss-watches-guide.com/21-jewel-movement.html
The number of jewels used in a watch movement is an indication of the design of the movement, not its quality. In fact, a cheap or poorly constructed 25 jewel movement can be less accurate and shorter-lived than a well crafted 21 jewel movement. A 25 jewel movement is used by companies such as ETA as a style preference, rather than a practical one.
https://www.reddit.com/r/Seiko/comments/i29x1s/5606_movement_23_jewel_vs_25_jewel_lord_matics/
[5606] movement, 23 jewel vs. 25 jewel Lord Matics Several sources on the internet state that the two additional jewels in the 25 jewel 5606 are for the barrel arbor ports. This would be great, as it pretty much eliminates the problem with wear that many lower tier vintage Seiko movements have.
https://quillandpad.com/2018/06/29/the-number-of-jewels-in-a-watch-movement-indicates-value-doesnt-it-a-myth-debunked/
Jun 29, 2018 · Jewels today are friction-fit into main plates and bridges, however that process only began around the 1930s. Before then jewels were “rubbed in” to a brass setting. The great disadvantage with this style of jewel setting is the time and effort needed to replace them.
https://www.amazon.com/seiko-5-automatic-23-jewels/s?k=seiko+5+automatic+23+jewels
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