The Yema Granvelle CMM.20 represents one of the most refined expressions of contemporary French haute horlogerie. With its automatic micro-rotor manufacture movement , an ultra-thin case, and an elaborately crafted guilloché dial, this timepiece combines tradition, innovation, and craftsmanship in a sophisticated and harmonious design.

Designed for luxury mechanical watch enthusiasts and those seeking an elegant, versatile and technically advanced timepiece, the Granvelle CMM.20 stands out for its balance between classic aesthetics and modern engineering.

Small seconds dial: a tribute to traditional watchmaking

One of the most fascinating elements of the Yema Granvelle CMM.20 is the small seconds counter at 9 o'clock , which adds a refined and vintage touch to the dial.

This classic complication is not just aesthetic: it improves readability and gives character to the layout, introducing a slight asymmetry that makes the dial more dynamic and interesting.

A hypnotic guilloché dial

The rich guilloché dial with concentric pattern and sunray finish captures the light in an extraordinary way, creating depth and visual movement.

Framing this handcrafted masterpiece is a ring with hour markers carved in stainless steel , an elegant solution that plays with shadows and reflections, giving sobriety and refinement.

The faceted and polished dauphine hands glide gracefully across the dial, completing a harmonious, clean and highly legible ensemble.

The result is a dial that does more than simply “show the time,” but transforms the passage of time into a contemplative visual experience.

Slim design and mechanical precision: the CMM.20 caliber

The heart of the Yema Granvelle CMM.20 is the Calibre Micro-Rotor Manufacture Morteau 20 (CMM.20) , an automatic movement developed in-house by Yema.

Thanks to the integrated micro-rotor , the thickness of the movement is reduced to a minimum, allowing for an ultra-thin case of just 8.60 mm .

Technical specifications of the CMM.20 caliber

• Movement: automatic with micro-rotor on ball bearings

• Frequency: 28,800 vibrations/hour (4 Hz)

• Accuracy: -3/+7 seconds per day

• Functions: hours, minutes, small seconds

• Power reserve: 70 hours

This combination guarantees not only elegance on the wrist, but also reliability and high-level performance.

39 mm case: architectural inspiration and comfort on the wrist

The 39 mm cushion-shaped case draws inspiration from the arches of the Palais Granvelle in Besançon , a city symbolic of French watchmaking and home to the Yema workshops.

Crafted from vertically brushed 316L stainless steel , with polished bevels and knurled edges, the case catches the light from every angle, creating an elegant and dynamic play of reflections.

Features of the case

• Material: 316L Stainless Steel

• Diameter: 39 mm

• Thickness: 8.60 mm

• Lugs: 20 mm

• Glass: sapphire with anti-reflective (AR) treatment

• Crown: Push-in polished stainless steel crown with engraved YEMA logo

The cushion-shaped crown with the historic “Y” engraved is an iconic detail that recalls the brand’s historical identity.

The sapphire caseback: a window into the manufacture

The sapphire crystal case back allows you to admire the CMM.20 caliber in all its beauty.

The rhodium-plated bridges are decorated with sunburst Côtes de Genève , creating a sparkling and dynamic effect when the movement is running.

This attention to detail reflects Yema's commitment to creating movements that are not only functional, but also aesthetically stunning.

Water resistance

The watch offers a water resistance of:

• 5 BAR / 50 meters

It is therefore suitable for everyday use (washing hands, light rain), but not suitable for diving or underwater activities.

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