I'll wager someone on the forum has data on Wylers!
I have an electronic circa 1971 which needs a new crystal. GS PA listings have some in the size range which are claimed to fit some Wyler models with 4 digit models such as 1176 and 1200. My watch has 9E100 inside the case and this reference shows up nowhere I can find.
Any ideas on a model number from early 70's with ESA-9150 movement?
I ordered one based solely on inside diameter, but there is clearly more to it. What I got
I'm not sure if this is useful or not, but I ran the above PDF through tesseract/OCR so here is a searchable version.
1965-Catalog-Crystal-Cross-Reference-Lists-Searchable.pdf
There are a couple of caveats. First, OCR is never 100% accurate (but this document is pretty clean, so it seems to have processed it quite well). Second, I only tried searching on my Linux laptop, so someone with Window$ will need to check that it works on that platform too.
To search, press <CTRL+F>