Marc Jenni Prologue

Presented at Baselworld 2010 by independent Swiss watchmaker Marc Jenni, Prologue is a sensational timepiece which features new construction which redefines the conventional crown system in a spectacular way.

Under the alias “JJJ” this ambitious project was born in June 2008. It took almost two years to arrive from a passionate idea to a finished object. The watch was presented to the public at the booth of the Horological Academy of Independent Creators at Baselworld 2010.

Marc Jenni Prologue watch

A grip, black ring rotates freely and gently around the entire watch case in both directions. The lugs were designed to allow the ring to rotate undisturbed around itself.

All three basic functions of a normal crown-function are easily accessible by the selector located on the case at 4 o’clock.

Marc Jenni Prologue watch red gold

In the first position, “WIND”, the watch can be wound up. By carrying the watch on ones wrist, it is wound by the 22K gold rotor of the automatic movement by itself. The power reserve indicator shows the current state of energy of the movement with a small “+” or “-” at all times.

If you want to change the date, you press once on the selector button and the selection hand jumps immediately to the mode “DATE”. One can then easily set the date on the ring.

The third and last position, “TIME”, is for time setting. You can simply rotate in either direction of the ring and set it to the current time. With a final press of the selector button the hand jumps back to its starting position and shows up on “WIND”.

Marc Jenni Prologue watch white gold

Besides showing the three functions pragmatically, the triangle has another reason for existing. It represents the coat of arms of the Jenni family from Glaris. This particularity is reflected on the gold rotor as well.

Marc Jenni Prologue watch case back

Another historical connection is the chosen alias “JJJ”. It hides the epitome of the horological activity of the Jenni family. The abbreviation stands for Johann Jakob Jenni, the oldest known ancestor of the family, who practiced the profession of watchmaker around 1780 in Glaris.

Technical details

18 carats rose or white gold, weight ca. 100 grams
Diameter 44 mm
Water resistant to 3ATM (30 meters)
Sapphire crystal with antireflective coating
Turning Ring: 18 carats gold with soft touch coating

Movement Caliber 2010, 11 ½ “
Power Reserve indication, 42 hours
28’800 vibrations per hour (4Hz)
Jewels 22
Push selector system
Oscillating mass in 22 carats rose or white gold

P01 – All black galvanic finish, with applied rose gold plated markers
P02 – Black / Ardoise galvanic finish, with applied rhodium plated markers
Hands: Diamond cut and polished rhodium / gold plated

Black Alligator strap, Hand stitched
Deployment Buckle: 18 carats rose or white gold, weight ca. 24 grams with security lock system