7S/4R/6R cap jewels/springs & balance reference/cheat sheet
Like Tree1Likes
  • 1 Post By guiri

Thread: 7S/4R/6R cap jewels/springs & balance reference/cheat sheet

Results 1 to 1 of 1
  1. #1
    Join Date
    Jan 2017
    Barcelona, ES

    7S/4R/6R cap jewels/springs & balance reference/cheat sheet

    Over the past few years of collecting, modding and restoring 7S/4R/6R movements, I've run across recurring scenarios:
    - Cap jewel flies across the room, cursing ensues
    - Balance/hairspring limits the amplitude, QC issue (newer) or corrosion (older), needs replacing
    - Movement is missing balance cock/assembly

    In researching replacement parts, there's plenty of misinformation. The Seiko technical guides can provide all of this, but it can be time consuming each time to track down the part numbers, and find a supplier. This post attempts to provide a "cheat sheet" for these commonly needed parts, and documented interchangeability.

    I've included parts info for CousinsUK, as it's my go-to source. Obviously we all end up on eBay when there's no direct source. It would be great to get other suppliers documented as well!

    Train cap jewels: All 7S4R/6R (Diafix)
    Cap Jewel: 0011 221 (Cousins SEI011221 £5.50)
    Cap Jewelled Spring: 0015 703 (Cousins SEI29690 £3.00)

    Balance jewels top/bottom: All 7S4R/6R (Diashock)
    Shock absorbing jewel: 0011 220 (Cousins SEI011220 £1.65) [also 700x series]
    Shock absorbing spring: 0014 577 (Cousins SEI014577 £3.25)

    Balance complete with stud
    7S26(A): 0310 020 (Cousins SEI310020 £13.35) [also 700x series]
    7S26(B/C)/4R36: 0310 197
    6R15B: 0310 046 (Cousins SEI310046/obsolete)
    6R15C: 0310 185 (Cousins SEI310185 £29.95)

    Balance cock (complete or balance cock)
    7S26A: 0171 107 (Cousins SEI171107/obsolete)
    7S26B: 0171 197
    7S26C: 0171 355 (Cousins SEI171355 £8.95)
    4R36: 0171 353
    6R15: 0171 115
    Last edited by guiri; January 1st, 2019 at 15:48.
    MrDisco99 likes this.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

    Similar Threads

    1. Need balance cap jewel shock spring for Chinese 2650 movement
      By bluesguitarplayer56 in forum Watchmaking
      Replies: 0
      Last Post: November 27th, 2016, 04:51
    2. Vostok 2416B Balance cap jewel shock spring advice needed
      By bluesguitarplayer56 in forum Russian watches
      Replies: 3
      Last Post: November 25th, 2016, 15:41
    3. Oiling balance cap jewels
      By RobR in forum Watchmaking
      Replies: 6
      Last Post: August 26th, 2013, 15:57
    4. Replies: 16
      Last Post: October 7th, 2010, 14:05
    5. Cannot remove Waltham balance cap jewels
      By sedge in forum Watchmaking
      Replies: 8
      Last Post: August 26th, 2010, 11:14

    Tags for this Thread

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts