Montblanc Le Locle Workshop Tour
Manufacture

Montblanc Le Locle Workshop Tour

By mkt33 · Jul 26, 2009 · 10 replies
mkt33
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Mike (mkt33) offers WatchProSite readers an exclusive behind-the-scenes look at Montblanc's Le Locle workshop, complementing an earlier report on their Villeret manufacture. This article provides a rare glimpse into the design, assembly, and testing processes for Montblanc's broader timepiece collection, including the then-new Rieussec chronograph. It highlights the brand's commitment to both traditional craftsmanship and modern innovation, particularly in material science.

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The production of Montblanc's timepieces occur in two locations.  Their top of the line Villeret timepieces dedicated to serious collectors are manufactured at the transformed Minerva factory located in Villeret.  Previous our PuristSPro moderator/watchmaker, Don Corson reported on this amazing workshop click here

Now Don has brought us the first sneak peak at Montblanc's Le Locle workshop.  Within these walls the remaining timepieces are designed, assembled, and tested including the new Rieussec chronograph.  I hope you will be as impressed as I am.

Please leave a note of thanks for MB and Don.

Enjoy,

Mike

 

A visit to Montblanc Montre in Le Locle.

Arriving at  Montblanc Montre in Le Locle you would think that you really made a wrong turn on the way.  The chemin des Tourelles is a little ally; no way two cars could pass, although a two way street.  Strangely enough one of Switzerland's biggest watchmakers is also on this street, Tissot, and Tissot’s factory is just across the street from Montblanc.

Montblanc has nested themselves in a beautiful Jugendstil villa.  A large addition is largely unseen partly buried in the garden.



On arrival I was welcomed by Florence Kirkorian, responsible for communication.  Look at the décor of these suites!  The mansion itself now houses offices and reception rooms.



We descend to the manufacture in the addition which is airy and light flooded.  Our first stop is the design and the technical department.



Here we see examples of the in-house design activities, from hand drawings to their integration and rendering on the computer.









Once on the computer it is easy to try out different possibilities, a bezel without or with diamonds, for example.



Once the designers think that they know what they want it is time for the engineers and technicians to tell them what they really want.  And to make a construction that will make for a waterproof watch that will withstand many years of use.



Here is where any new materials will first be tried out.  Montblanc was one of the first to use the DLC (“Diamond like carbon”) coating process on their cases and could not rely on the experience of others to learn how to make them so that they are long lasting.  They did it themselves.



Montblanc has organised its production along the traditional Swiss method of an établisseur. They design and specify the components and then have them made by specialist companies.

Since 2008 Montblanc is producing its own movements with the start of the production of  the Montblanc Rieussec Manufacture calibres.

Here we are in the quality department.  This is a key department for the production quality and all components whether made in house or by external specialists have to pass here.  In this picture we see to carts of parts.  Each cart has the parts that arrived during one week.  At Montblanc the watch components have to be controlled for correctness within one week of their arrival to reduce stock and delays if the parts are not conform.



Components that have been controlled and are conform become part of the stock and are placed in the Kardex.



Each movement is tested first being wound on the winder and then placed on the bank of automatic testers to be tested in 5 positions.  Movements that do not fulfil requirements are returned.



Each workplace has a PC to be able to have all the information about the components being tested and to be able to enter the test results.  Testing patterns are changed and corrected according to the history of the components.



This optical comparator from Aubert makes comparisons between the real components and technical drawings and can also aid in giving numerical information if there are non-conform parts.



After the final watches are completed they come back here once more for a final inspection before shipment.












Here we see testing equipment for both pressure, watertightness, and underpressure, to test the fitting of the glasses.



In the next installment we will see the assembly of the Montblanc Nicolas Rieussec movements, the MB R110 and MB R200.

This message has been edited by mkt33 on 2009-07-27 08:45:15

About the Montblanc Calibres Ref. MBR110

The Montblanc Caliber MBR110 is an in-house developed and manufactured automatic movement, integral to Montblanc's commitment to vertical integration in watchmaking. This caliber is a foundational movement for several of Montblanc's timepieces, particularly within collections that emphasize traditional horological values combined with modern manufacturing precision. Its development marked a significant step in Montblanc's journey to establish itself as a serious watchmaker beyond its pen-making heritage.

The MBR110 features a twin barrel system, providing a substantial power reserve. It operates at a frequency of 28,800 vibrations per hour (4 Hz) and incorporates a balance with screws for fine regulation. The movement's finishing often includes traditional decorations such as Côtes de Genève and perlage, visible through sapphire casebacks on many models. Its robust construction is designed for reliability and accuracy in daily wear.

For collectors, the MBR110 represents Montblanc's dedication to genuine manufacture status and its ambition in high-end watchmaking. It underscores the brand's investment in in-house capabilities and its ability to produce movements that meet stringent quality standards, offering a compelling value proposition within the luxury watch segment.

Specifications

Caliber
MBR110
Crystal
Sapphire

Key Points from the Discussion

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The Discussion
DX
dxboon
Jul 26, 2009
Thanks, Mike!

It's interesting to see the fusion of manual design efforts (like drawings) with technology like computers, and all the various other machines seen in your post. It does make you wonder what it must've been like to design, build and test watches 100 years ago. I didn't know that Montblanc was one of the first to use DLC on cases. Do you know which timepiece from their collection was the first to result from their tests of the DLC-ing process? This was another great read, Mike. You know that I al

MK
mkt33
Jul 27, 2009
I've asked Mr. Schmiedt for some clarification...

all the watchmakers are out on their 3 week break but when they get back I will hopefully have some more technical information on the exact DLC process MB uses. I've also asked Mr. Schmiedt if I can have a sample to do some extreme testing on Hopefully some mythbuster type video will result! Best, Mike

DX
dxboon
Jul 28, 2009
Ooh! I love Mythbusters!

Let me see if I can find my safety goggles around here somewhere...looking...looking... Thanks, Mike! Hope your week is going well, so far! Cheers, Daos

MI
MiniCooper
Jul 26, 2009
Thank you....

for a wonderful tour.... Cheers

SJ
SJX
Jul 27, 2009
Looking forward to the next part

Great job Don and Mike. - SJX

AM
amanico
Jul 27, 2009
Great report, Mike

Wow, the Montblanc Team work in a very nice place! It is always something to see the creators of our watches at work...In the creation moment! Thanks for this report, Mike. Best, Nicolas

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