These look like 1970’s to 1980’s vintage.
You might want to post them here as well:
https://forum.iwc.com/c/vintage-timepieces/6/
There are some knowledgeable IWC experts there.
gatorcpa
Thanks, posted there.
Thanks, posted there.
IWC did make quite a few vintage models with tuning fork or quartz movements in the 1970s and 1980s.
Do you have a picture of the inside caseback of the second watch?
Not sure which one the caseback you have shown belongs to. It's a Ref. 3035, and the case serial number dates it to 1980 (DateYourIWC). Here's the official datasheet for it (which shows the black dial watch you have shown - the white dial one might be the same model, there was an enamel dial version for the 3035, too):
Thank you very much.
Here is the case back for the black dial one.
It is actually the same reference, 3035.
Mine has a 2369 caliber, which I suppose is just a version below 2370 indicated in the profile picture you've shared.
So I suppose this indicates the watch is likely legit.
But I am not able to find anything about these movements.
Btw, from where did you get the details for the 3035 watch?
My pleasure to help you out with this. Are these watches that you own? Or looking to buy? If the latter, be aware that there isn't much of a collector's market for these quartz pieces, so these would be strictly "buy to own and enjoy", not "I'm not sure about this and can always flip it later". That said, I like the design, especially the black one.
These detail pages come from an old catalogue that has been on the internet for a long time, thanks a bunch to the guy who hosts it - you can find it here:
https://www.gregsteer.net/IWC/IWC_Index.htm
To date your IWC, this is your adress of choice:
https://www.moeb.ch/dyIWC/
The second case serial says "1980" too, I think this is more or less the latest date it will show. But fits well in this case.
I don't know anything about the calibers 2369 and 2370. I know that IWC used some ETA calibers around this time - which they did refinish to a nice standard - but the google AI at least seems to think that the 2369 is a Girard-Perregaux movement. Girard-Perregaux were among the leading developers of quartz movements in Switzerland, very high quality at the time. These days, very old and hard to get replacement parts for, having a specialist who can repair them would be a bonus as the factory won't be able to help.
