There have been a couple of threads and I've come close to buying a chronograph but chickened out in the end. We have a user, Blaise, who is probably the person who knows the most about them on the forum. I'm assuming your interest is in vintage rather than what I assume is the revived brand?
Unfortunately the pictures appear to be missing from Blaise's post.
https://forum.tz-uk.com/showthread.p...tion-Share-it!