The movement in the Portuguese Chronograph.

with the Portuguese Chronograph, is the movement heavily modified by IWC? Or is it more of less a standard ETA Valjoux 7750?

Hi there, and welcome to the forum.
There is a lot of information on this topic available in the forum archives.

I found this doing a quick search:
www.iwc.com/forum-en/message/119032.html

which links to a very good article at:
www.iwcforum.com/Uhrenjournal.html

Hope this helps.

Cheers,
Evan

I'm not sure these old articles represent the situation of nowadays. Until a few years ago IWC upgraded the ETA-movements themselves. In the end puting their name on the movement. Now ETA makes the total finished movement according to IWC specifications, quite possibly exclusively for IWC. That may lead to the same movements as before. The end result is a very reliable movement. I believe the above is true for both the Automatic and the Chrono. ETA could of course make movements for others according to the same specifications, why not, and why would that be bad as long the movements for IWC too would be first class?

Kind regards,
Paul

The standard Valjoux 7750 has 25 jewels. The Portuguese chronograph has 31 jewels. The reason for this is that the movement is specially modified to change the positions of the subdials to 12 and 6 o'clock, which doesn't exist on a "standard" 7750. As such the movement coudl be considered as "heavily modified", beyond all the "normal" special improvements that IWC has on the base chronometer version of the 7750.

Thanks guys for the replies, I have read that article, but I heard a rumor that IWC now has the entire movement made by ETA.

And MF's reply still leaves me wondering... Does IWC still modify the ETA7750 in house to change the position of the subdails? Or is this work now done by ETA for IWC ?

Thanks all.