Jump to content

Recommended Posts


I'm impressed with the depth of knowledge and help on this forum! I'm thrilled to find this awesome resource. I'm in the beginning of my journey in watch repair. I'm a former automotive tech turned desk jockey. I fell deep for the magic of watches and it didn't take long for me to want to open them up and see how they work. I was thrilled to use my hands again, and watches take up less space than project cars, so the wife is happy too!

I've passed the first 2 levels of Mark's courses, and they were immensely helpful. I have "serviced" a few junk movements, broken a decent watch (hairsprings are delicate!) and finally last week had my first successful project: a Seiko 4006a-6031 which came with a broken crystal and non-working calendar works. Its now keeping time within 5 seconds a day with no beat error!


Next steps: taking level 3 of the courses and troubleshooting a vintage Benrus that I just can't seem to regulate in. 


Anyway, nice to meet you folks, looking forward to learning from you all. 

Link to post
Share on other sites

Thank you!

Not sure if I need a new post for this... but since you asked!


Got a Benrus model A10 (eta 390) that I've serviced and with a fresh mainspring. It runs way to fast.

I've tried:

  1.  New mainspring (had low amplitude to start)
  2. Demagnetize
  3. New hairspring and balance wheel from a donor

I got the amplitude up, but the numbers are the same even after the transplant:

 The beat error especially is what is throwing me off- its virtually unchanged with a different balance so it must be something on how its mounted?


Any ideas would be so appreciated.



Link to post
Share on other sites

Join the conversation

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

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  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.

  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

    • Good day! i have choice to buy this legendary watch in exactly my favorite condition: 1.) unserviced  2.) untested  I wouldn’t mind there is no evidence if barometric module works, but what I mind is, I can’t find any technical information of how this module looks and works.  I like to get challenging new movements and also don’t want to crops the line of spoiling something.  Does any of you, kind souls have any literature or link or photo or even oil painting of this module? The watch is referred as 53223. Cheers! Jakub 
    • We haven't or at least I haven't entirely forgotten? The problem is I've seen this somewhere? We've discussed sleeves before I don't know if we covered ones for wristwatches probably have but I've seen one of these before I just need to remember where the reference was that I saw it once I remember I can find that and I'll attach it. Then the reason why we not getting copious quantity of answers is because if you notice anything related to American watches in particular earlier watches especially anything involved with casing and sleeves there aren't that many people on this group that work with those. Plus I was hoping for a better name inside the case. Because of you go to an offbrand it's going make it a lot harder and getting a sleeve to replace that anyway is going to be much much harder so as soon as I can remember where I saw the reference to this?
    • I am working on this thing.  It needs a new hairspring--I am searching. But what I wanted to mention here refers to the design of this movement.  Notice that one large plate that wraps around one side of the movement.  It is a real bear to get it installed given that one of the wheels is buried underneath and difficult to position while trying to manage the escape wheel. The later 6/0 Walthams (e.g., the 6/0-D which I have) splits this plate into two pieces. I am a neophyte and as such, have not seen a vast number of movements.  Maybe stuff like this is common.
    • Perhaps back to basic school lessons may be the answer.  🤔 Put some iron fillings on a piece of thin paper and put this on something plastic that you can hold over the item being checked. Moving it about should see a pattern in the iron filings develop.  If none then no magnetism in item?
  • Create New...