That's an other special one made for a tue afficionado of unique pieces...
Case started as a cartel 5513. From an old batch: lots of oddities in the details but after considering what could be done out of it the 6541 appeared to be a smart choice.
The case was slimmed down, and more difficult: it was modified on the inside to accept the gen specs milgauss dial much larger than a sub dial. Bezel was crafted from a cartel 1655, and case back too. It was was shaved low done, almost flat.
What can't be seen here is the movement retaining ring. The 2824 it held into a custom made pill box style brass ring clipped onto the movement. pretty much like the genuine. So the mount is very tidy, and the movement well protected inside. I will post some pics of the making afterwards...