I think the rose gold perpetual squelette is my all-time favorite JLC piece. The contrast between the warm rose gold and the rhodium and the depth of the movement are stunning.
Any idea on the price?
John
Great report, Nicolas! I think a lot of us were awaiting the new MUT with great anticipation, and what a surprise that JLC launched TWO new versions AND a special anniversary edition in that lovely chocolate brown and rose gold combo, which I think is also my favorite rendition.
I had been holding off on selecting a thin dress watch because what I realized I wanted was an MUT, but in a somewhat larger size -- that would be perfection, I thought. But you know what they say, be careful what you wish for.
First of all, the MGUT is, IMHO, an entirely different piece, gorgeous to be sure, but not quite comparable to the MUT. I am not even sure, given its height, that it qualifies as "ultra thin," although perhaps it does if ultra thin is defined relative to case diameter. Maybe some of the experts here can enlighten me. In any case it is a nice addition to the JLC line up and a good start to their renewed commitment to producing slimmer watches.
Second, the new MUT has the same 849 movement as the previous models of the MUT, but placed in a larger case. This seems a little like cheating; but I am more seriously concerned that this decision undermines the integrity of the MUT. The 849 movement, if not the original MUT watch itself, have achieved somewhat legendary status as "best in class", I think, and many consider the 34mm MUT and its movement both masterpieces. From what I can see, it is pretty rare that a watch is produced in any category that is recongnized by so many to be the definitive current production example in its class, and the 34mm MUT did that for ultra thins. But perhaps I am greatly overestimating its status.
So, does the placement of a pretty small movement (even relative to the 34 mm case, as is my understanding) into an even larger 38mm case produce something less than a masterpiece? Perhaps the 849 works perfectly in a 34 mm case, and maybe the combination with a 38mm case loses something in the translation. What exactly is happening in all that extra space inside the larger case? Are there technical issues of concern when a small movement is placed inside a large case? I am certain the 38mm MUT is beautiful, but I am just not sure that it is up for consdieration as best in class as the original was. Also, at 6.31 mm thick, again, I am not sure how this places the MUT in the ultra thin category as a whole -- while still very thin, it is no longer among the very thinnest compared to the original MUT or other really fine examples put out by other manufacturers; but in terms of height relative to diameter, it may in fact be quite impressive.I don't know the answers. Again, some enlightened opinions would be appreciated.
What do others think about how the new MUT stacks up against the original, not so much in terms of beauty or elegance, which I think are more subjective, but in terms of their each being truly extraordinary or even seminal examples of the ultra thin watch? I think that one of the appeals of the original MUT is in its being arguably the best interpretation of the ultra thin horological challenge in recent or current production. I think another appeal is that somehow the MUT became more than the sum of its parts, creating a very rare and sublime combination of artistry and technical achievement. Maybe it was too much to hope for an equal level of achievement from JLC with a new MUT, and perhaps it would have required beginning with a new movement. But as for now, I will need to reconsider my plans for a thin dress watch.
respo
I do not know enough about watch proportions to discuss it intelligently, but, given the dimensions you cited, JLC increased the thickness of the watch by over 50% while increasing the diameter by just over 10%. And that may be just right, I don't know. I suspect you are 100% correct in that the new proportions work beautifully, and that maintining the 4.2mm thickness for a 38mm diameter would not have worked. And perhaps, there are few ultra thins out there that are as large as 38mm, so maybe this new version is extraordinary in that way. Again, I just don't know. I do know that I almost always agree with your taste in specific watches and brands, so I am inclined to agree with you here, too.
I look forward to pics of the caseback to see how small the window into the movement is, and I look forward to seeing both the new MUT and the Grande in the metal some day.
respo
Actually, I was quite surprised when reading that the new 38mm "ultrathin" is 6.31mm thick.
That a very significant increase in thickness, from the previous 4.20mm
I would have imagined that JLC would have increased slightly the thickness of the watch, in proportions to the increase of diametre. That would have given a thickness of 4.69mm.
But 6.31 that is quite a lot of additional thickness, and I wonder why they did need to increase thickness so much.
The classic Ultrathin had a thickness ratio of 12% (Thickness / Diameter). That was the proportions which somehow defined the standard for ultrathin.
The other classic JLC ultrathin, the pocket version, had a similar ratio (I have a very old ultrathin ("couteau") JLC pocketwatch which, at 45.0mm for 5.0mm thickness is at 11%, so comparable, but even more remarkable as the movement is very large at 38mm, not 21mm!)
Now, the new watch has a thickness ratio of 16.6%, so it is proportionally 38% thicker than the classic Ultrathin. This is such a difference that I don't consider it ultrathin anymore.
The new watch is definitively good looking, relatively thin watch, there is no doubt about it, and its proportions might work very well altogether, but IMHO, it is not an ultrathin anymore.
It is now more a "hand wound master classic" than an ultrathin .
(now, that is what I call ultrathin.....)
I like the other three but not the skeletonised master 8 days perpetual. IMHO, the skeletonised work is so shoddy and it looks like a pile of scrap metal being arranged to look like a watch. This is certainly not the standard of JLC. I believe they can do a much better job.
I need a few days to get over this nightmare.
Anyway, thanks Nicolas for the report.
Regards
Ling
But, don't you think this skeletonised work makes it very difficult to read the calendar and time?
Unless one is told that practicality is not important here.
Regards
Ling
The JLC strikes me as existing more on the side of the Richard Mille aesthetic spectrum than the Vacheron side. It is surely not skeletonized in a traditional manner like a Vacheron or Patek--it has a very modern flair and IMO exhibits the movement wonderfully. While I love the romance and craft associated with traditional skeletonizing, generally speaking, I can't bring myself to buy/wear a traditionally skeletonized piece because I perceive it as perhaps too feminine, too delicate. However, the JLC squelette does not appear feminine or delicate whatsoever and I could fully see myself buying and wearing one regularly (except that it costs about as much as a Porsche Carerra S...but that's another issue). Just my opinion...
John
...if I may.
First, the report is outstanding, and what we have now come to expect from each of our 'Duetto' moderators. Thank you - merci millefois - Nicolas.
Second, the watches are a credit to JLC. We will perhaps agree to disagree amongst ourselves on what is thin and what is ultra-thin; whether the classic MUT needs indices or not; whether a new calibre was mandatory (would we have expected this of anyone but JLC?); even whether the finish of the QP is or is not up to standard. What cannot be denied, however, is that JLC has 'delivered' right across the spectrum this year: a magnificent Reverso Gyrotourbillon (sigh...); a new AmVox (a sports tourbillon no less!); not one, but two Polaris re-editions (and so faithful to the original!); not two but three new Atmos clocks (each one a bold statement, either horologically or artistically); a new worldtimer, jewellery pieces - the list goes on. Now here, some favourites (old and new) in a classic combination to mark a key point in the history of the manufacture. You asked - JLC listened. Where else have you seen such energy this year? Bravo M. Lambert, Mlle. Metrailler et al.
Finally, just as we have been spoiled with a wealth of treasures from JLC, so also we have been given service sans pareil by Nicolas and Jerome who have elbowed their way into receptions, shows, boutiques and workshops, who have studiously avoided the free champagne and canapes, who have pointed cameras in improbable situations and typed into the small hours, fingers bleeding, to bring to us immediately not just pictures, not just news, but passionate, knowledgeable, balanced (hmmm....) and deep reviews of all the things that might interest JLC aficionado and newcomer alike. Without doubt the best coverage of any brand, anywhere. Gentlemen: thank you !
Cheers,
pplater.
Thanks pplater for saying this for all of us.
The work from JLC and the coverage provided here is more than any of us could have expected. The offerings this year from JLC (as well as some other companies) is almost too much to take in all at once. I certainly have been revisiting posts again and again to really let it all sink in.
These are great times, horologically speaking, and we should be very thankful to the moderators and PuristsSPro for bringing it to us.
Your hard work is really very much appreciated.
Andrew

It is indeed a fantastic collection
Asi
I like the Master Grande tourbillon, especially with the black dial. The 1833 edition ultra-slim looks great too.
I don't like the skeleton perpetual though. In fact, none of the JLC skeleton watches so far really appeal to me, I find the skeletonised JLC watches slightly industrial looking, and lacking the fineness and delicacy of Vacheron or the Daniel Roth Lumiere. That is more a question of style than of quality, even though I dislike the style of the skeleton watch, the finishing is as good as all the other high-end JLC watches.
- SJX