. Rules and practice for adjusting watches . The A djustment to Isochronism and Positions on the location of the stud hole in the balance bridgeas demonstrated by Figures 9, 10, 14, 15. When the spring develops to the right from colletas shown in Fig. 9, for example, the proper point ofattachment is on the right side of collet as shownat E Fig. 9. and also at J Fig. 14. If it develops to the left as the springs of allfine Swiss watches do, the proper point of attach-ment is on the left side of collet as shown at FFig. 10. 33. Results in Vertical Position Rates Due toChanging the Pinning Point.

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. Rules and practice for adjusting watches . The A djustment to Isochronism and Positions on the location of the stud hole in the balance bridgeas demonstrated by Figures 9, 10, 14, 15. When the spring develops to the right from colletas shown in Fig. 9, for example, the proper point ofattachment is on the right side of collet as shownat E Fig. 9. and also at J Fig. 14. If it develops to the left as the springs of allfine Swiss watches do, the proper point of attach-ment is on the left side of collet as shown at FFig. 10. 33. Results in Vertical Position Rates Due toChanging the Pinning Point. In either of the above instances the spring willdevelop upward as it leaves the collet. Thesepoints of attachment always produce a fast pendantup rate when compared to the opposite, or pendantdown rate, and all high grade watches are originallyfitted with springs conforming to this principle. If these points of attachment were changed to theopposite side of collet so that the spring woulddevelop downward as shown at G Fig. 11, andH Fig. 12

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