So I just found at my grandfathers house an old mudu watch that belonged to my great grandfather(I’ll take a picture of it the next time I’m there).
To my surprise I wound the crown and it was still running perfectly
Couldn’t find much information on this Swiss brand online so I figured maybe one of you will have any info..
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I'm sure if you've done some digging you've seen the link from another forum. But for anyone else interested this is the best information I've found.
https://www.christopherwardforum.com/other-brands/let-s-do-the-mudu-t32312.html