New to watch repair ** Safe Zone For Learner Watch Repairers **
Discussing subjects relating to learner watch repairers.
More experienced repairers - please guide learners with patience and respect 
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By luiazazrambo · Posted
"The spring i found has 1.4mm thickness and 1.65mm height." I didnt write length because someone heated up the end and made a new hook, i assume the MS was broken. -
What dimensions is the existing spring? Edit Here's the movement details from the serial number. https://pocketwatchdatabase.com/search/result/waltham/27237349 There's also this so the 1.9mm height you've quoted doesn't seem right?. https://www.ofrei.com/page307.html Last piece of info. -
I thought for others that might be curious of how things are mounted on these. Amusing YouTube video down below as some stuff in the video isn't quite right and he wasn't quite sure what diameter the rod is. So I thought I'd clarify that in case anyone else's curious. I have the PDF of their catalog for these type of units unfortunately this one is custom so we don't get the exact specs any place. I did always wonder if anyone ever bothered to ask the company for specs but apparently not as I never found any. There are quite a few videos of using the unit but they don't always a classic on YouTube videos properly keyword their videos so they are sometimes hard to find. The hole itself in the unit is designed for 8mm rod. 8 mm does fit really nice. The key is to millimeters and it fits nice and tight. Then an image out of the catalog with their suggestion or an idea for mounting. Although it looks like most of the ones I've seen they use a shaft with a key and then they use a screw or to hold things together as opposed to double keyed shaft like it's shown below. Ondrives rino odus-gb-e-brochure.pdf -
Checking ID with the old gasket still in place is useless. Remove the old gasket, using a good quality caliper check ID - this is your new Gasket diameter. New gasket should fit just right in the bezel. It should not be moving at all, but you should not apply any force to put in place. Assuming that I - Gasket Thickness is 0.35mm, Glass & Gasket Ø32.00mm the Glass diameter will be 31.30mm (31.30 + 0.35 + 0.35mm = Ø32.00mm) -
By luiazazrambo · Posted
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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