Nicolas,
Thank you for posting these shots of the new Master Control. Black perfects this watch in my eye. The corresponding black date disc keeps the coherence intact, but I agree that the polished frame around the aperture may be too overt.
That quibble aside, this may be my favorite JLC SIHH 2015 release. I find the silver/steel/white monotone of most Master line models to be sterile and cold, so the warmth of dark tones always attracts my eye, and the power of contrast with white metals seals the deal. I'm thrilled to see JLC took the time to consider and enhance their bedrock models amid the flurry of high complications and expansion of the Rendezvous line.
Clearly, the value proposition is outstanding with this Master Control. Manufacture case and movement, outstanding testing and precision is assured thanks to what must rank among the most exacting 1000-hours tolerances in the JLC line, and I have a personal preference for black dials in white metals. The new watch also spares me the challenge of trying to track down the old black dial Master Control WG boutique edition when the time comes to expand the family. Personally, the idea of a superb JLC simple watch that trades on its own identity appeals more than the reflected glory of the mechanically similar (but aesthetically derivative) TT Geophysic.
In the near future, I agree that the MUT case may be the way to go with the Master line (the new MUT Moon black dial is a pointed example), but as a mid-life enhancement to the existing 39mm case, this novelty delights me.
Best,
Tim