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Waltham Wrist Watch mainspring size

luiazazrambo
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luiazazrambo Super WRT Addict

luiazazrambo

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Hi All,

This is my first waltham (wrist) watch, and during disassembly I found a set mainspring which I would like to replace. I checked the usual websites 17jewels, ranfft but I could not identify this movement and I am not sure if the MS I found has the factory specifications/dimensions. My barrel inside diameter is 11.5mm, arbor is 3.7mm, height of the barrel is 1.9mm. The spring i found has 1.4mm thickness and 1.65mm height. Would anyone know this movement and what MS did it have exactly? (I only have these pics made with my microscope during disassembly the whole mvmnt does not fit and the mvmnt is currently in a cleaned state in pieces waiting for me to put it together again)

Br, Lui

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AndyGSi Distinguished Member

AndyGSi

Posted
Posted

So are you saying the existing spring is 1.65mm high?

If that's the case then it's the wrong spring to start with.

You also need to check the barrel depth again to confirm this is correct.

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luiazazrambo Super WRT Addict

luiazazrambo

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Posted (edited)

Checked already it is 1.9mm. Meanwhile I came also to the same conclusion that the MS I am looking for is numbered as 2230 which is 2.05 mm in height (and made in different strengths), that's the reason why I double checked.. maybe it is the correct height. The barrel lid is actually not the press in type but the one which sits on the top so maybe the 2.05 what we are looking for.

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I put the barrel arbor and lid together and I think the gap and the 1.9mm adds together to 2.05mm:

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2230 here which is for size 0s & 3/0s: 

https://pocketwatchdatabase.com/reference/mainsprings

 

Edited by luiazazrambo
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