Dear Watchmakers
I purchased an IWC Ref. 1871. It seems to be a true project I am looking forward to work on.
But the first and probably major problem for me is to open the case. It is a square case body that has cut outs in the corners of the back. Each corner has a tiny bore, too.
I did my homework and searched for information online and found a discussion on the Omega forum about the same topic with some hints but with no real result for me. Hints: the case is the same as the one on the “Zenith Respirator”, it works with spring-loaded pins, URL:
https://omegaforums.net/threads/iwc-case-problem-how-to-open-help-needed.16751/
On a website of a dealer I found an image of an opened Zenith case. I can see bolts on the sides of the inner part of the case that contains the movement, URL:
https://www.vtgwatch.com/zenith-respirator-luxe-automatic-28800-date-vintage-watch-vtgwatch.html
Does anyone have some experience?
Best