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https://www.etsy.com/market/17_jewels_watch
Poljot 17 Jewels Watch Ussr Vintage Mechanical Soviet Rare Полёт Wrist Russian ivonabg. From shop ivonabg. 4.5 out of 5 stars (134) 134 reviews $ 24.20. Favorite Add to Vintage Ladies Semag Wristwatch, Womans Watch Case Only, Working Wind Up Mechanical Black and Gold Face Swiss 17 Jewels Incabloc maggiemaevintage. From shop ...
https://www.etsy.com/market/17_jewel_incabloc
Vintage Nastrix Pocket Watch Swiss 17 Jewel Incabloc Wind-Up Movement Silver Plated Covered Case Un-Used Mint Condition Works Perfectly!
https://www.prestigetime.com/blog/what-are-the-jewels-in-a-watch-for.html
Dec 11, 2020 · 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?
https://en.wikipedia.org/wiki/Mechanical_watch
A 17 jewel watch has every bearing from the balance wheel to the center wheel pivot bearings jeweled, so it was considered a 'fully jeweled' watch. In quality watches, to minimize positional error, capstones were added to the lever and escape wheel bearings, making 21 jewels.
https://www.muzeum.ca/blogs/news/are-my-old-watches-worth-anything
A 17 jewel watch is considered to be fully-jewelled. Historically, rubies were most commonly used as the functional jewels in antique watches due to the fact that they are hard and wear down slowly. This reduces friction and streamlines the process of watchmaking.
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