CMM.20
FRENCH MANUFACTURE CALIBER
Caliber entirely designed and developed in France by our watchmakers. Micro-components (bridges and mainplates) manufactured directly in our YEMA workshops in Morteau.
ULTRA-THIN MICRO-ROTOR CALIBER
Due to its smart architecture resulting in a contained thickness of just 3.70 mm (26% thinner than an ETA 2824), this new caliber equips sleeker and
refined cases.
-3/+7 SECONDS ACCURACY
Optimised mechanical accuracy with near chronometer-certified performance.
70 HOURS POWER RESERVE
Enhanced power reserve thanks to innovating Tungsten micro-rotor and a large barrel.
MOVEMENT
Mechanical automatic Ø 32,20mm
SELF-WINDING
Bi-directional tungsten
micro-rotor
FREQUENCY
4Hz (28 800 A/h)
POWER RESERVE
70 Hours
ACCURACY
-3 / +7 seconds
MAGNETIC RESISTANCE
Non-magnetic alloys
ULTRA-THIN CALIBER
3.70mm
REGULATING ORGANS
Glucydur balance wheel
SHOCK RESISTANCE
Incabloc® double cone
JEWELS
33
COMPONENTS
190
DECORATION
Galvanic treatment
OWN DESIGN LOCALLY MANUFACTURED
The Calibre Manufacture Morteau 20 (CMM.20) micro-rotor unique’s design offers high performance thanks to its clever architecture and high-quality Franco-Swiss components. Entirely designed and developed by Olivier Mory in La Chaux-de-Fonds, the regulating organs are manufactured in Switzerland while the bridges and mainplates are manufactured by YEMA in its Morteau workshops.
3.70mm
ULTRA-THIN CALIBER
Due to its smart architecture resulting in a contained thickness of just 3.70 mm, this new micro-rotor caliber will equip much thinner and elegant cases.
TUNGSTEN MICRO-ROTOR
The bi-directional oscillating micro-rotor winding mass is made of a high density tungsten alloy in order to achieve the purpose of counterweight for this small volume but high weight micro-component, allowing optimized winding and securing a power reserve of 70 hours.
GLUCYDUR BALANCE WHEEL
The balance wheel is made of Glucydur, a non-magnetic, low-thermal-expansion metal alloy which offers high resistant to deformation, corrosion, magnetic fields as well as low coefficient of thermal expansion, most suitable for precision elements that need a lot of dimensional stability.
BLACK GALVANIC DECORATION
The CMM.20 has been designed as an innovative, new generation, high performance caliber. In order to reinforce the contemporary appearance of the caliber we have opted for a modern and differentiating aesthetic with black galvanic decoration of the bridges and plate. The micro blasting treatment of the main plate and bridges, applied with a sand blasting machine, results in a neutral, matt surface finish in contrast with the oscillating weight "gunmetal" finish. The uniform black galvanic coating preserves the decorative micro blasting finish of the surface.
TALENTED FRENCH WATCHMAKERS TEAM
Four talented French watchmakers, cumulating over 120 years experience at the most prestigious watch brands, have taken up the challenge of creating YEMA’s first Manufacture Caliber
Olivier Mory
Watchmaker Developer
20+ years experience at Audemars Piguet, Sellita, Piaget, Cartier, Panerai, Skill, YEMA
Patrick Augerau
Senior Watchmaking Engineer
45+ years experience at Omega, Audemars Piguet, YEMA
Jean-Paul Boillot
Master Watchmaker
40+ years experience at YEMA
Nicolas Bailly
Technical Watchmaker
15+ years experience at Cartier, Pro Horlogerie, YEMA
YEMA'S IN-HOUSE WATCHMAKING MACHINING CENTER
During the last two years, YEMA has made substantial investments aimed at insourcing a good part of its production, constantly improving the quality of the manufacturing processes as well as developing a future range of French Manufacture calibers.
This significant development has required substantial R&D, new equipment and the expansion and modernization of our workshops and production lines. YEMA’s Manufacture Calibers benefit from improved precision and performance and will soon equip premium YEMA timepieces.
LOCAL PRODUCTION
Over the past few years, YEMA has made significant investments aimed at insourcing a good part of its production and constantly improving the quality of its manufacturing processes by implementing latest equipment as well as expanding and modernising its workshops and production lines.
In addition, YEMA now works with new local partners in France and Switzerland within a range of 72km of its workshops, to secure a more responsible and higher quality production.
Movement Components
All Manufacture movement components are manufactured in France and Switzerland within a range of 72km from Morteau by recognized craftsman in fine watchmaking. The caliber bridges and mainplates are manufactured in YEMA’s workshops in Morteau where final assembly of all components takes place.
COMPONENTS
ORIGINS
Movement Design
Switzerland
Movement Components
France + Switzerland
Assemblies
France
A DYNAMIC REGIONAL WATCHMAKING ECOSYSTEM
YEMA workshops are based in Morteau, the cradle of French watchmaking, a few steps from the Swiss watchmaking region. This cross-border watchmaking community concentrated along the Jura mountains has gradually transformed into a true regional ecosystem recognized as Intangible Cultural Heritage by the UNESCO in 2020.
