I just had to get one of those mysterious MuDu watches and a model Extraflat arrived today.
Smuggled into the county and sold in harbor taverns, someone should have also explained, that you should not try to open a watch with a grappling hook…
Well, opening was easy with the right tool, but I had hoped to find out quickly what movement it has inside. There is absolutely nothing on the movement, under the balance wheel etc., and I sincerely hope that someone will recognize it without having to see the keyless works.
I tried the Ranfft advanced search, but no luck, especially the Hairspring Stud Carrier doesn't match with anything. Size approx. 26mm, f = 18.000 A/h