Jump to content

Watch case size

Cjw180

By Cjw180
in Watch Repairs Help & Advice

 Share

Recommended Posts

Cjw180 New Member

Cjw180

Posted
Posted

I have refurbished a few watches, but I have never had to re-case a watch before. I am having trouble in finding a case of the correct size, are there any charts that relate the size of the movement or dial to a case size? I have searched but I just confuse myself more each time I try.

WatchMaker Super WRT Addict

WatchMaker

Posted
Posted (edited)

Almost certainly no such chart exists. Notwithstanding that a lot of cases don't have an ID on to start with, watch manufacturers will have designed their cases to fit their choice of movement-with-dial so there is no need/incentive to have some industry wide 'bestfit' chart. 

Important dimensions can always be found on a great resource like ranfft. Here you can find your movement and its key attributes (click on the Comments about the data link on a ranfft page to get help on what the terms mean if you need to). If you find the dimensions for your movement and then were to find a case that was designed to house a different movement but that has the same (or very nearly the same) dimensions then there's a good chance your movement will fit. The 'wildcard' however can be the dial e.g. the outside dimension of a 11.5''' movement is typically 26mm but the dial on it could be anything upwards of this and vary by several mm from manufacturer to manufacturer depending on their design of their watch..

With this in mind it might be helpful to understand what exactly you're trying to do e.g. what specific movement you have; what is the dial width; and when you say 're-case' are you trying to find a replacement case etc.?

 

Edited by WatchMaker
  • Like 1
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • JohnL
      Reusing mainsprings in an automatic and slipping

      By JohnL · Posted

      Hi all, Might a posit a theory and people can chime in and tell me if I'm barking up the wrong sycamore: If a mainspring is a bit coned and returned to its barrel for reuse, is it less likely to slip when the spring gets to fully wound?  For a bit of background: Slava 2427, barrel walls greased with 8217, six dots evenly spaced around each of the barrel walls, then smeared/ spread along the wall before popping the springs in. 
    • nickelsilver
      How do you thread a screw on the lathe without shearing it off?

      By nickelsilver · Posted

      What kind of screwplate are you using? The old Martin ones commonly came in B and L variants. The thread pitch is slightly different between the two, and the full thread diameters tend to be a little off from metric nominal, but the B plates are close enough to metric that they work most of the time. The numbering follows (pretty much) the numbering for stems- at least how stems threads are commonly called out. So a "tap 12" would be 0.70mm. (I can only guess the "tap" size for stems comes from these old plates)   These old plates tend to cut some and also form the thread by displacing metal. I think in part because they are low-tech, and also generally a bit worn. So it's good to start quite undersize with your initial diameter, and work up to something that gives a full thread form. There are variances plate to plate too, most likely a combination of manufacturing differences and wear.   I haven't tried any modern screw plates, I think they are of questionable origin, and even if marked in metric, probably merit some experimentation like the antique ones to find a good starting diameter.    
    • Mark
      Setting Hands On 7750

      By Mark · Posted

      Exactly. As Richard says, all good - I helped you by splitting your comment made on an old topic into a new topic of your own in order to help with clarity 🙂 Welcome to the forum by the way 👍
    • RichardHarris123
      Setting Hands On 7750

      By RichardHarris123 · Posted

      Mark, means he has made this a separate post, he has split it from the old post. You don't need to start a new thread now. 
    • RichardHarris123
      Carriage clock

      By RichardHarris123 · Posted

      No, my first time. I've watched the video, lets hope it looks as good as yours. 
×
×
  • Create New...