View single post by e.avery
 Posted: Tue Sep 19th, 2006 12:31 pm
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e.avery



Joined: Tue Apr 4th, 2006
Location: Kentucky USA
Posts: 2722
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 There are 5 basic types of jewels

1. hole jewel - this is one that the pinion passes throug like a wheel

2. Cap jewel - this is the jewel that covers a hole jewel

3. Roller jewel - this jewel is mounted in the roller table

4. Pallet stone jewel - these are the jewels that are mounted in the pallet

5. Shock jewel - also known as an Inca or Kif jewel

21 jewel watches gen. have upper and lower balance jewels, upper and lower balance  cap jewels, a roller jewel,  2 pallet jewels, a hole jewel at each end of the escape wheel, a jewel at each end of the pallet arbor, one hole jewel at each end of the fourth-wheel pinion, one hole jewel at each end of the center wheel pinion, an hole jewel at each end of the center wheel pinion, one cap jewel at each end of the pallet arbor and one cap jewel at each end of the escape wheel pinion.