Need Technical Manual For Swiss Chrono

[oldhippy]

Just look at the difference and the real thing.

[ro63rto]

No calibre under balance wheel too.

[omgiv]

That isn't the same movement.  This is IWC's version of the 7750 (i.e. 79350).

[jdrichard]

Son of a mother duck!

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[bobm12]

Careful with Chinese clones...they might not be exactly the same and replacement parts are almost non existent lest you buy a whole identical movement...always a surprise to work on...or sometimes it goes really smooth...or not. Whatever!

[jdrichard]

Careful with Chinese clones...they might not be exactly the same and replacement parts are almost non existent lest you buy a whole identical movement...always a surprise to work on...or sometimes it goes really smooth...or not. Whatever!

thanks for the advice bob

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[jdrichard]

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.

Then does this make sense ?

http://www.iwc.com/forum/en/discussion/5626/

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[omgiv]

That was a very good read but I still say that the movement you have is an Asian clone.  There are lots of red flags that come up saying it isn't an ETA or IWC movement.  One which is pretty ways to see is that the shock spring is certainly not Incabloc.

 

This is also a pretty good read:

 

http://www.iwcforum.com/Movements/IWC_Calibre_7xxx.pdf

[steven]

I confirm it's an Asian 7750 from Shanghai factory. I've serviced many of these.

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[jdrichard]

I confirm it's an Asian 7750 from Shanghai factory. I've serviced many of these.

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Thanks for putting the cap on the bottle. Are they easy to get parts for. It will need a new krown and Stem

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[steven]

Stem is easy to get but the screw down crown is more difficult. Can't the old crown be used again?

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[jdm]

Thanks for putting the cap on the bottle. Are they easy to get parts for. It will need a new krown and Stem

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Cousins and ofrei sell a variety of screw down crowns and tubes. Edited March 24, 2016 by jdm

[jdrichard]

The Crown has been mangled on the opening. Not sure how he did this

From Canada

[bobm12]

I can't really tell much without access to the part but I've repaired screw in crowns by finding a compatible tube and crown (both)...the crown itself may not be available for different reasons...and the generic offerings seldom have a "compatible" thread or fit. As far as the stem, originally, I bought all available Chinese stems as "tools" since sometimes it becomes a trial and error to find the right one. It all depends who made the movement (what factory) and what name they decided on giving it. They simply are not made to be repaired!

[oldhippy]

In my time I never had Chinese junk to deal with only Russian junk.

[jdrichard]

In my time I never had Chinese junk to deal with only Russian junk.

Very Funny. I should do the minimum on this piece

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[Louie]

For the stem, a ETA 7750 will fit. You also get the chinese ones in eBay.

Crown is a different story. You have to go thru Chinese fake watch dealers.