New member in Tuxedo Park, NY
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I'm working on a 602 that has date. Well the bridge has Cal 602 on it.
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Job done. After a lot of fiddling and testing I used this method . I purchased the correct size glass from eBay. To drill the hole I used a diamond core drill bit . I have a small pillar drill press and submerged the glass in water inside of a jar lid with a cork mat underneath the glass. I drilled very slowly and it was successful but it did chip a bit but it’s not visible. A very happy customer..
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I've not bought a replacement mainspring before. According to my digital calipers the broken spring in my Lancashire Watch Co. Pocket Watch is 2.4mm wide & 2.0mm thick & the barrel is 16mm diameter. The nearest Cousins has to this (GR6573) only differs in the barrel width - it's 15.5mm . Is this difference significant? Also, the old spring has a pin across the outer end to secure it in the barrel but the Cousins info implies it's "a normal bridle" (whatever that means) rather than a "T" (which I assume is how my old spring is categorised). Help, please!
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Another option is to an old piece of clock mainspring, if you have some thick enough.
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Thanks guys. The replacement balance was way too big to fit the watch movement, my point being that it’s definitely not the correct part for this movement. The spring was similar dimensions, but clearly not close enough to avoid other adjustements. Yes, I’m aware that springs are usually sold with the balance wheel complete, but its very often possible in my experience to be able to swap out a spring from one balance wheel to another of the same type. I tried it anyway as it was there in front of me and easy to do. No harm in trying. In the end I’ve repaired the cracked collet and refitted the original balance complete, it’s back in business. Just a shame I couldn’t identify and buy the correct new part, but this model seems to be fairly lacking in parts data.
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