I strongly suspect it's been cobbled together.
The watch was sold on ricardo.ch last week. Apart from it looking totally unfamiliar, the chapter ring looks dreadful to me, with the outer edge badly damaged right round its circumference.
There is another similar watch on ricardo.ch this week (picture below). The seller has a different name but the same address. It is described as possibly being a prototype. Again, it has a movement from a chronometer.
I agree that they are both similar to the watch in your first picture. What is the story behind that particular watch?
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