One model apart Girard Perregaux 4945 & 4946, different movements .
ETA (2892) and GP(3370) both movements use the Dubois Depraz chrono modules, hence the high Jewell count of 63 !
Enjoying this thread, and I’m adding another bit to keep it going.
Here’s a pair of Fliegerchronos from the 1940’s. The Hanhart is an accuracy freak show, and holds a couple of seconds per day no matter what I do with it. The Glashutte is not far behind it in terms of its accuracy.
Two early and related classmates. Sadly, they were migratory birds (that said, sorry for the poor quality, it's more than 10 years ago that I took this picture):