If watchmaking is born of astronomy, the Moon is the inspirational element. The Moon allowed ancient peoples to understand the early divisions of time and the passage of the seasons. It helped us grasp the notion of time that comes and goes at a steady pace: a concrete manifestation of the “cycles” that structure our comprehension of time to this day.

Waxing and waning through the phases of the new moon, first quarter, full moon and last quarter, the Moon brings poetry to watchmaking. It breathes into the mechanical the tender mystery of a celestial body, the secret of a satellite that remains –despite its relative proximity to us– largely unknown. The dark side of the Moon continues to be one of the great mysteries in space exploration.

Jaquet Droz Grande Seconde Moon
Jaquet Droz Grande Seconde Moon

When Jaquet Droz set about adding a Moon Phase to its Grande Seconde, the challenge was to transcribe these dimensions of precision and poetry while preserving the esthetic codes of the piece centered on its signature “8” design. The brand chose to place the Moon at the heart of the perpetual calendar located inside the large seconds hand dial, forming a nexus between date and Moon (since the two are correlated) while staying true to the dial’s original esthetic. The inclusion of the Moon Phase allowed Jaquet Droz to design a multi-level dial that lends a new depth to the piece. To offset the standard error of a 59-tooth movement (an error of one day approximately every two years and eight months), the brand has developed the “mechanism 135” complication to ensure the movement maintains perfect accuracy for 122 consecutive years. The astronomical Moon phase is set using a discreet corrector positioned on the case at 8 o’clock.

Jaquet Droz Grande Seconde Moon Movement
Jaquet Droz Grande Seconde Moon

The Grande Seconde Moon Swiss Serpentinite is the heir to this destiny, and contributes two new dimensions. The first is the choice of serpentinite for the dial. This scaly-looking rock has a texture comparable to snake skin and offers a peculiar sensation to the touch. The brittle nature of the rock reveals the unique expertise of the Jaquet Droz craftsmen who cut it. Day after day, with meticulous skill, the craftsmen work to develop one of the brand’s eight codes: mineral dials. Jaquet Droz mineral dials capture the natural brilliance of the stones and magnify the treasures of the Earth.

Jaquet Droz Grande Seconde Moon Watch Review
Jaquet Droz Grande Seconde Moon

The Grande Seconde Moon Swiss Serpentinite is no exception. The Swiss particularity of this precise serpentinite is the other new dimension of the piece. The rock is taken from the sheer slopes of the Matterhorn, from a spot near the Hörnli Hut, the legendary base camp of the first ascent of the Matterhorn in 1865. In creating for the Swiss market alone, this Grande Seconde Moon with a 43 mm serpentinite dial, Jaquet Droz demonstrates its attachment to its native land, and to the mythical and majestic Matterhorn that has become a symbol of Switzerland across the globe. In a similar way, Jaquet Droz brings across frontiers the values of Fine Watchmaking and its Philosophy of the Unique, as embodied by this Grande Seconde Moon Swiss Serpentinite issued in a numerus clausus of 88 pieces.

Jaquet Droz Mens Watch
Jaquet Droz Grande Seconde Moon

Jaquet Droz Grande Seconde Moon

Technical specifications:

Reference: J007530271


·       Serpentinite dial, 18-karat white gold applied rings.

·       Stainless steel case.

·       Moon disc in serpentinite, star and moon appliques in 18-karat white gold and 22-karat white gold respectively.

·       Pointer-type date display and astronomical moon phases at 6 o’clock.

·       Self-winding mechanical movement.

·       Power reserve of 68 hours.

·       Diameter 43 mm.

·       Numerus Clausus of 88.

Movement: Jaquet Droz 2660QL3, self-winding mechanical movement, silicon balance spring and pallet horns, double barrel, flat bridges, heavy metal oscillating weight


·       Off-centered hours and minutes, large off-centered second

·       Pointer-type date display at 6 o’clock

·       Astronomical moon phase at 6 o'clock

Jewelling: 30 jewels

Power Reserve: 68 hours

Frequency: 28,800 v.p.h


·       Stainless steel case

·       Diameter Ø 43 mm

·       Height 13.23 mm

·       Individual limited serial number engraved on the case-back

Water Resistance: 3 bar (30 meters)


·       Serpentinite dial, 18-karat white gold applied rings

·       Moon disc in serpentinite with star and moon appliques in 18-karat white gold and 22-karat white gold respectively


·       Hours, minutes, seconds and date with rhodium treatment

·       Date with red varnished tip

Bracelet: Rolled-edge hand-made black alligator strap

Buckle: Stainless steel folding clasp

The price for the Jaquet Droz Grande Seconde Moon is CHF 18,800.

For more information visit Jaquet Droz Online.