Indexless balance

Sep 21, 2020,04:19 AM

Hi all,

Linked to my thread in the IWC forum, I have been reading about the IWC 52000 family of movements. The company talk about the use of an indexless balance as a positive.

It may be that I do not understand what an indexless balance is but I thought it is not considered a high quality balance? As in balance with weight adjusted index, etc are better. So why does IWC seem to promote it as a positive?

Many thanks,
Chi Kai

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I tired researching but not too much Joy

 By: chikai168 : September 21st, 2020-13:24
Let me know if you come across anything! BW, Chi Kai

The term "indexless balance" is imprecise terminology and the root of your confusion.

 By: brandon1 : September 21st, 2020-13:53
The 52000-series is free-sprung, and they no-doubt meant that it does not have a curb-pin regulator (sometimes called an index regulator). Hope this helps. Brandon


 By: chikai168 : September 22nd, 2020-02:35
That clears it up! In photos of the movement, I can see some screws in the balance wheel. So the “indexless” term does not refer to the screws/ weight on the balance wheel but refers to the regulator pin? Thank you! BW, Chi Kai

Correct. See link to FHH glossary:

 By: brandon1 : September 22nd, 2020-14:12