The high-precision COSC-certified Mecanograph visibly vibrates 8 vibrations a second. The perpetually beating balance-wheel with its adjustment screws and the busy action of the escapement lever with its ruby palettes releasing the slow rotation of the train wheels is visible through the left half of the dial. The second hand is suspended above the precision machinery.
Mecanograph innovates in terms of the technology of self-winding watches by modernising an historical operating system. Within this distinctive and rare mechanism, small and large pawls work together with the automatic winding gear train. In addition to its spectacularly attractive appearance, it offers the advantages of a bidirectional winding system.
Calibre LM31 was entirely conceived and crafted by Louis Moinet and Concepto. It is composed of 182 elements. It displays chronometer-worthy precision, as is confirmed by its COSC certificate. Its most remarkable characteristic is the way in which it reveals the entire regulating organ, as well as the escapement and its gear train, highlighted by the anthracite coating on the mainplate and bridges.
Inserting the seconds hand within the mechanical ensemble was one the main challenge. It was made possible by a distinctively shaped applique and a double read-off hand.
Seen from the back, the balance with screws shows a different and original face compared with the front view. It is fitted within a set of anthracite-coloured bridges adorned with “Côtes du Jura”® and enhanced with 26 jewels made using the Verneuil process and presented through openings, as well as by blued steel screws.
To achieve its chronometer-level precision, the manufacture-made movement LM31 vibrates 8 times a second or meaning 28,800 vibrations per hour. It is endowed with a 48-hour power reserve and the rotor is mounted on a high-tech ceramic ball bearing mechanism.
This exceptional movement asserts its originality through the strong character of its exterior. The external minute track as well as a half-dial is adorned with the emblematic “Côtes du Jura”® motif and the time is read off on hands designed by Louis Moinet and nicknamed “Gouttes de Rosée”® (for their dewdrop design).
The case is made from grade 5 titanium with polished and satin-brushed finishing. Two versions combine 18-carat rose gold and titanium. The design echoes the Louis Moinet signature codes, meaning an upper six-screw bezel and its unique interchangeable crown tube system for which an invention patent has been filed.
Mecanograph is a unique creation issued in various 60 and 365-piece limited editions.
Technical specifications
Mecanograph
Features and functions
Hours & Minutes
Running seconds, suspended at 9 o’clock
Dial & Hands
12 – 6 o’clock : “Côtes du Jura”® design
6 – 12 o’clock : visible mechanism
“Gouttes de Rosée”® (dewdrop) design, rhodium or gold-plated
Movement and finishing
Mechanical self-winding composed of 182 parts
Calibre LM31, developed and manufacture-made by Louis Moinet and Concepto
Winding: Self-winding
Oscillations: 28,800 vph (8 V/S, 8 vibrations per second)
Frequency: 4 Hz
Lines: 13 ¼
Power reserve: 48 hours at maximum wind
Jewels: 26
Balance: Glucydur
Rotor: Mounted on high-tech ceramic ball bearings featuring a “Côtes du Jura”® design
Case and strap
Case: Original Louis Moinet® design featuring six-screw bezel
Materials: Grade 5 titanium with polished and matt finishing
5N 18-carat rose gold, polished finishing
Diameter: 43.50 mm
Thickness: 15.60 mm
Water resistance: 50 metres
Case-back: Equipped with 7 screws, engraved with individual number and Louis Moinet symbols
Crystals: Two sapphire crystals with anti-glare treatment on both sides
Crown guard: Patent pending
Width between lugs: 24mm
Strap: Hand-sewn Louisiana alligator leather with alligator leather lining
Buckle: Double folding clasp in 316L stainless steel
Presentation case
Louis Moinet book, hand-written guarantee
Limited Editions
LM-31.20.50 365 watches Grade 5 titanium, black dial
LM-31.20.60 365 watches Grade 5 titanium, silver dial
LM-31.40.55 365 watches Grade 5 titanium & 18K rose gold, black dial
LM-31.40.65 365 watches Grade 5 titanium & 18K rose gold, silver dial
LM-31.40.95 365 watches Grade 5 titanium & 18K rose gold, havana dial
LM-31.50.55 60 watches 18K rose gold, black dial
LM-31.50.65 60 watches 18K rose gold, silver dial
