This horology masterpiece, which positions chronograph as a central component of the watch, not only celebrates the 10th anniversary of the Louis Moinet atelier but also pays tribute its illustrious founder.
Traditionally the chronograph is considered as an additional or secondary function to a timepiece whose primary function remains timekeeping. With Memoris, Louis Moinet rewrites the traditional concept of chronograph by no longer seeing the chronograph as a complication, but rather as the primary function of the timepiece.
In short, Ateliers Louis Moinet did exactly what the eponymous inventor of the chronograph did in his day; taking a completely different approach to watchmaking rather than attempting merely to improve on an existing model. Indeed, that’s how Moinet invented the chronograph and was the first to achieve high frequencies – among his other remarkable lifetime achievements.
As a bonus, Louis Moinet has come up with a wholly exclusive use of synthetic gemstones. Usually destined to serve as good pivots and provide proper lubrication of the movement components, gemstones have now found a new purpose elsewhere. Black zircon, in a screwed setting, has been used decoratively – on the case horns.
The Memoris is a 46 mm timepiece, available in pink gold or white gold, in three limited editions of just 60 pieces each. The new caliber on Memoris is the LM54. With a rhythm of 28,800 vibrations per hour (4Hz), it has 302 components and provides a 48-hour power reserve. Over sixty parts have been designed and manufactured to allow the chronograph to be presented atop a dedicated movement plate, separating it from the automatic movement beneath.
“Energie Plus” is an ingenious, automatic pawl winding system featuring an elegant spring with a ‘crab claw’ design. Completing the system, a miniature ceramic ball bearing is mounted on the dual-material rotor.The advantage of “Energie Plus” is that it allows the piece to be wound up in both directions, with a minimum of excess travel. This optimizes each movement of the rotor, recovering its energy, and winding the movement more effectively.
In the finest prestige watch-making tradition, the swivel of the yoke is aligned along the same axis as the second wheel to improve the engagement of the latter’s moving parts. This arrangement provides the best possible distance between the second wheel and the clutch wheel, for every stage of the chronograph function: start, stop and reset.
Features and functions
Monopusher chronograph with column wheel
Chronograph mechanism visible on dial
Hours and Minutes (at 6 o’clock)
Seconds (at 9 o’clock)
60-second chronograph (central hand)
30-minute chronograph counter (at 3 o’clock)
Dial and hands
Chronograph hand, “Monogram” design
Hour & Minute “Gouttes de Rosée”® dew-drop hands, blue-tinted with luminous coating
Rounded lacquered dial, diamond cut bead
Movement and finish
Automatic click movement with chronograph function on dial; hours and minutes off-centre at 6 o’clock
302-component LM54 caliber, designed and manufactured by Louis Moinet
Winding: Automatic, bi-directional
Oscillations: 28,800 vibrations per hour
Balance wheel: Glucydur, chronometer quality
5 position settings
Lines: 13 ¼
Power reserve: 48 hours
Decoration: Côtes de Genève, diamond-polished facets, diamond-cut chamfers and circular gears with 5N colour finish and straight-line steel.
“Energie Plus” system
Pawl winding mechanism
Pawl winding system: comprises a baseplate and two jewelled pawls
‘Crab claw’ spring mechanism
Gearing: automatic wolf-teeth gear
Ball bearing: 7 Myrox balls (ceramic), diameter: 0.397 mm
Oscillating weight: Dual material, with concentric “Clous de Paris” and “Fleur-de-lis” pattern
Case and strap
Case: Original Louis Moinet®, composed of 52 pieces, design with two-part bezel and 6 screws, assembled at a 17° angle
Monopusher: “Clous de Paris” pattern
Material: 18K gold
Water resistance: 50 meters
Case back: Fitted with 7 screws, engraved with individual number and Louis Moinet symbols
Lugs: Screwed settings (1 black zircon jewel and 3 screws per lug)
Crystals: Two convex sapphire crystals with non-reflective coating on both faces
Crown protection: Patent pending
Distance between lugs: 24mm
Strap: Hand-sewn Louisiana alligator leather with alligator lining
Buckle: 18K gold folding claspwith “Fleur-de-lis” motif, two-strand, black DLC-treated steel
Louis Moinet book
LM-54.50.80: 60 watches- 5N 18K rose gold
LM-54.70.80: 60 watches- PD150 18K white gold – rhodium-plated mainplate
LM-54.71.80: 60 watches- PD150 18K white gold – blued mainplate
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