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Posted

Greetings!

I'm trying to replace a quartz movement in a Chinese fashion watch for a friend of mine. Thought it would be easy but I can't get the movement and dial out the back of the watch. Looking closely from the back of the watch with the case back off, I can see that the dial is prevented from coming out the back of the watch by a ring inside the case that travels the circumference of the case except for by the crown tube. This ring is part of the case and is not removable. The case also has a subtle front to back taper rendering the case back opening smaller than the dial diameter.

The movement of course is attached to the dial and the dial will not come out the back. So it looks like the dial/movement have to come out the front. But there is no obvious way I can see to go in through the front. Perhaps the mineral crystal can be removed some how? I would very much appreciate some advice. 🙂 Many thanks!

IMG_2563.thumb.jpeg.89ae6b0a3599f3115bff2ee2ef4bf7c6.jpegIMG_2565.thumb.jpeg.754f4b59d02f2042dcb4d823c09cb924.jpegIMG_2564.thumb.jpeg.2e597711887801959a93c6050a9f2497.jpeg

 

Posted

Sometimes you need specialized tools to get the crystal off.

Watch Front Cover Glass Opener Flat Glass /Arch Glass Remover Screw Tool Watch Part Repair Tool Accessory for Watchmaker
https://a.aliexpress.com/_mrbeKIw

This is a relatively new tool designed to pull the glass off from the front with double sided tape. I haven't used it personally but it was developed by my mentor's think tank group from China. He has been using it for a few years.

Other times, you do this...

 

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    • Hah! Well, California will have to do. Lived in TX for a brief period back in the early 70s, though, so maybe that counts. 🙂 Funny you should mention making vacuum tubes- I've actually tinkered with that! It's REALLY tough to do, and I've never made one more complicated than a simple diode that barely worked, but I have played around at it. But there's just no infrastructure for vacuum tube fabrication. I can get a lathe and learn how to use it to make complex parts, and while it might take a while to learn- and money to get the equipment, of course- it is possible to do more or less "off the shelf". But vacuum tubes, not so much. There are a few folks out there doing some crazy cool work with bespoke tubes, but they have setups that are far beyond what I can manage in my environment and it's mostly stuff they built by hand. I also have been playing with making piezoelectric Rochelle Salt crystals to replace ancient vacuum tube turntable needles- nobody's made those commercially for probably 60 years. I'm a sucker for learning how to do weird things no one does any more so I can make things no one uses work again. (I think this is drifting off the topic of lathes, lol).
    • You shoulda been born in Texas. Tough to make a vacuum tube though. You can substitute with a MOSFET eq ckt I guess. I was playing around making a pinion the other day. More to it than meets the eye.
    • Well, turns out it was a fake bezel! The crystal is domed mineral glass and I was able to find a cheap replacement that should be here in two days.  I used my crappy little press to pop out the cracked crystal, Ill give the case a good cleaning in the meantime and do a once over on the movement.     
    • Early ‘90s Debenhams in Oxford Street at InTime Watch Repairs. The older guy was one of my mentors Mr John Campfield, fantastic ex-Omega watchmaker. Good times - black hair gone now! 😄
    • Heh. Well, also I just want to be able to do it, for no other reason than it's interesting. Same reason I restore antique tube radios and ancient computers- like, from the 1970s.  Sometimes, the parts just aren't there and you have to know how to make them. Learning how is a challenge and can take months or years, but it's honestly the best part! You can't beat that sense of triumph when you do something that's really hard to learn to do and do it well.  
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