Do you have an eye for detail?

Can you see it? Of course you can. It's an escape wheel jewel from a Seiko 7S26 movement. Yes, it's tiny. In today's video, Andrew and I talk about different shock resistance devices in wrist watches - and why the function of these devices can not be assumed by how they look.  You should watch it - for no other reason than from an educational standpoint. The video is only 6 minutes long and I guarantee your appreciation of both horology and the work involved in the servicing of your watch will increase significantly. https://youtu.be/Gw8jLs3uUw0 Let me be clear: we are not making YouTube videos for entertainment purposes only. Our goal is to share with you what horology is all about. Every member of our small team is actively engaged in the production. The content that comes from independent watchmakers is unbiased and the result of decades of practical experience gained behind the bench - the only content you can trust.

How many jewels are inside Rolex Cal. 3135 ?

While doing a bit of research on jewels, I've decided - for the first time ever- to actually count the number of jewels in the Rolex Cal. 3135. To my surprise, the total count is 40 - not 31 as marked on the auto bridge. Obviously, there has to be a reason behind this- either I am not counting properly or some jewels are not to be counted :-)

1. barrel arbour jewel, lower
2. great wheel, lower jewel
3. 3rd wheel, lower jewel
4. inter. calendar pinion, lower
5. escape wheel, lower jewel
6. escape wheel lower cap jewel
7. pallet, lower jewel
8. balance wheel, lower jewel
9. balance wheel cap, lower jewel

10. barrel arbour jewel, upper jewel
11. auto driving wheel, lower jewel

12. balance wheel, upper jewel
13. balance wheel cap, upper jewel

14. balance wheel, roller jewel

15. auto reverse wheel 1, lower jewel
16. auto driving wheel, middle jewel
17. auto reverse wheel 2, lower jewel
18. rotor weight, lower jewel

19. date disc 'dummy' jewel
20. date disc 'support' jewel 1
21. date disc 'support' (side) jewel 1
22. date disc 'support' jewel 2
23. inter. calendar pinion, upper jewel
24. date disc 'support' (side) jewel 2
25. date disc 'support' jewel 3

26. escape wheel, upper jewel
27. escape wheel cap, upper jewel
28. second wheel, upper jewel
29. 3rd wheel, upper jewel
30. great wheel, upper jewel

31. rotor weight, upper jewel
32. auto driving wheel 1, upper jewel
33. auto driving wheel, upper jewel
34. auto driving wheel 2, upper jewel

35. pallet jewel 1
36. pallet jewel 2
37. pallet bridge jewel, upper
38. second wheel jewel mounted inside cannon pinion
39. minute wheel pinion bridge jewel
40. yoke / cam jewel