Jump to content

Need Technical Manual For Swiss Chrono


Recommended Posts

The counterweight winding mech has fallen out among other things. The guy who gave it to me is a vet chopper pilot and a good guy and really wants to see this thing run again. I a up to the challenge.

Sent from my iPhone using Tapatalk

Link to comment
Share on other sites

The only other thing I can find is here. It shows pictures of how the isolating weights are fixed on their watches,if you click on cal families you will see what I mean.

http://www.watchalyzer.com/education/movements/iwc-movements-passion-for-innovation/

Looking on the net there's not much technical stuff about. You could try contacting them.

Link to comment
Share on other sites

That is an Asian copy of the ETA 7750 and very likely a replica IWC. You should still be able to follow the ETA 7750 guide to service it though.

You have just confirmed my thoughts on the matter. A giveaway, apart from the general finish or lack of, is the blued screws, properly blued screws would be blue in the slots, these are not. They have certainly not been heat blued!

Link to comment
Share on other sites

Purely for aesthetics. You will find this in most high end watches, also the bridges are nicely chamfered and finished. It's worth remembering that Omega and Rolex are not high end watches, I'm talking about the really expensive stuff.

Link to comment
Share on other sites

The blued screws are usually done for decorations purposes. I have blued screws myself over a flame where the slot has not changed. I think it is because the screw was coated in something not removed during the polishing process. I did not polish the screw slot. I think that these screws are possibly blues with a chemical process.

Also, the IWC 79350 is much more finely decorated and finished. It also has a triovis adjustment on the balance.

Link to comment
Share on other sites

Purely for aesthetics. You will find this in most high end watches, also the bridges are nicely chamfered and finished. It's worth remembering that Omega and Rolex are not high end watches, I'm talking about the really expensive stuff.

So Geo, you are pretty sure that this movement is an Asian Replica? If so, I need to tell this guy and slightly deflate his ballon. As well, I will be a bit more aggressive in the repair.

Sent from my iPhone using Tapatalk

Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • You often see the term used on old watch part boxes.  Staffs for bracelet watches, timing washers for bracelet wstches etc.
    • The Boro has changed quite a lot over the last 20 years, and not for the better. I actually moved out of the town 15 years ago to a small village not far away. Thanks for the pdf! Looks a great read. I'll get it printed today and put it on my work bench!
    • Not having all the fancy equipment, this is a way I came up with. I never said it was the best, the most ideal or the safest way. Working on balances is always a delicate task whereby full concentration & common sense should prevail. I was well aware of the "dangers" / short comings involved, hence my "warnings", as quoted above. The balance wheel of the Omega was nice true, flat and one could clearly see how much gap there was left before the grinding wheel would touch the balance wheel. I stopped when the generously applied diamond paste started to touch the rim of the balance wheel, which turned out to be with a seat thickness left of 0.1mm. Tapping the remainder of the staff out went easy and flawless. My idea of penning this article was to show/share a way which, in my case, perfectly succeeded. If deemed to risky, or if the balance wheel is not true or has a wobble, other methods have to be followed.
    • I loved his explanation of a teardown 😅 Ex military Richard Perrett, pretty knowledgeable guy.
    • I also see a bit of danger for the wheel, at least you have to keep away from it and may get a too thick rest ring. My rest rings are about 0.05 mm. Better way would be a grinding wheel touching the staff with its circumference. Frank
×
×
  • Create New...