MuDu has been discussed on WUS vintage forum, and the general consensus seems to be that the story is true. The watches themselves were decent, equipped with proper, fully jewelled Swiss lever movements from suppliers like FHF. However, the distribution of them was very unofficial in its nature. Pubs, mostly.
The name comes from the surnames of the owners of the company behind MuDu (Brevinex SA), Muller and Dubach. Seems to be no trace of it earlier than the earliest trademark registration date, that being 1957.
I always hope for the best. Experience, unfortunately, has taught me to expect the worst.
Elim Garak, Star Trek: Deep Space Nine
No good deed ever goes unpunished.
Rule of Acquisition no.285