A. Lange & Söhne

I remind you that this movement is NOT a combo of the movement of the Datograph Perpetual with a Tourbillon. It was redesigned and features a new lay-out. Fx...  

Most of the reworked (or should I say, new?) movement is done on the Perpetual Calendar which is nothing like the old one. Which is a shame, its all covered up by the dial...I think Lange Perpetual Calendar modules are beautiful and deserve openworked or ... 

However, from the back, this has got to be the best looking movement I have ever seen.

They have very classical and constraint designs. But when you flip the watch around you get to see mechanical watch porn. Which means that when the situation is appropriate you can show off. But in a very classy and good way. I believe that ALS fans are L...  

And much appreciated for the thorough response Are. Here's my own take on it. Lange is a relatively conservative brand dial-side wise versus the competition. Very dressy, very clean with clear mathematics of the proportions visible. Dial side yes- but wha... 

Patek's priority is on aesthetics. Patek also does not treat the sapphire for better reading as Lange does. Lange's look is certainly conservative and in my opinion more romantic in the whole line up and interestingly Patek becomes romantic in the top end... 

Never knew about the Patek scale before. I'll need to have a closer look now. Also now that you mention it, I just remembered that PP also just doesn't put hacking seconds into their watches (except certain ones). Still puzzles me today if they are using ... 

I'll make a little post about it but the hacking second is difficult to make if you want to make it right. The purpose of this feature isto be more precise i.e. being able to synchronize the second hand start with the real time. The thing is that most of ... 

Would like to know more about it, am always interested in the technicalities of the movements. Personally, I feel typical hack second mechanisms with a spring lever on the balance are sufficient in most cases? As the only loss of precision is when the bal... 

One would think Patek could get the scaling right, for the price one pays for its chronograph.

I may get flamed for that but I think it is (sad but) true. So they probably don't care as long as the watch looks good and is complicated. Personally I think they do look fantastic but I have no use of a Chrono function so I do not own one and thus do no... 

Why not do it right? Why not scale it correctly? It's just as easy as scaling it incorrectly. That will make those who use the chronograph function-and those who just want to know their watch is precise-feel better. I think it's a matter of aesthetics; an... 

this is not the only example of PP allowing compromises into their product and which lower volume manafacturers I cannot see letting past QC. (I own 4 PP before I get accused of any unfair bias here). It would drive my OCD crazy if I did own a chronograph... 

Nearly all do incorrect scaling. I guess it is the price for looking good as a dial? Still the 5170 is a very, very well conceived and executed chronograph with great, new improvements and a top watch to get. Best Moritz

and movement decoration choice in ALS. However, I think that this is not the point and it is more a cultural question. Ask a Swiss, he might say the PP/AP/VC are more elegant and less show-oo, ask a German I guess he would say the opposite. ALS (and in th... 

Most of the base chronograph module is retained; the levers and such are interchangeable with a L951.6. The two bridges redesigned is a relatively simple rearranging just to accommodate the large tourbillon. Meanwhile, it's what's in the middle and dial s... 

I have to try and find sources for the technicality of this one but thank you for your infos. Yes, the re-arrangements of the bridges seem to be simple. Best Moritz

Looking at the movement on first glance-what, a month ago now?- I thought I was seeing something new; and not just because therein resides a tourbillon. I understand the comments and criticisms of some of the other posters (they would like MORE eye candy)...