Jump to content
  • 0
Pradeep Sarin

Balance wheel axle wobble normal?


Watch: Waltham wrist watch from about 1950's.

Used to work fine.  Opened it up to clean the crystal from the inside and the dial. Now the problems are:


1: Runs face up, but not face down (the hands are off, so its not the hands sticking.

2: One jewel fell out - can't figure out where its from!

3: Examined the balance wheel motion under a microscope (when its running facing up. A slight wobble is noticed. 
     Video is posted at: Link to video of waltham wrist watch balance wheel wobble (watch face side)

     Zoomed in video at: Zoomed in view of balance wheel axle wobble

4: Is this wobble normal? Is there a jewel supposed to go in there, holding the pivot in place? 

 5:  For comparison, here's a view of the balance wheel axle from the back side of the watch, where there is a jewel in place:

    balance wheel axle from back side of the watch


And here's a  zoomed picture of the the jewel that fell out: it's 1mm diameter, and has a 3 pronged sleeve around it:

dropped jewel



1:  is the balance wheel axle wobble normal?

2: Where does the jewel go back in?


I am a first time poster to this forum, so please be gentle. Have a liking for old mechanical watches (and old things in general). I do have access to fairly sophisticated workshop facility in my lab, so I can make whatever tools are required to press-fit jewels etc.

Share this post

Link to post
Share on other sites

0 answers to this question

Recommended Posts

There have been no answers to this question yet

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...