The crown is a high precision part. Your watch is equipped with a pushed crown, it is fitted with seals to prevent any water penetration. Your watch is waterproof only if the crown is pushed down all the way.

The crown has 2 positions :

0 : Push-down crown / Winding position
1 : Time setting / Mareograph setting position

The CMM.30 tourbillon caliber has a single large barrel delivering a comfortable power reserve of 105 hours. After a period of non-use, it is recommended to restart your watch with a few turns of the crown.

To wind your watch, set the crown in the winding position (Position 0) then turn the crown clockwise around 40/50 times.

Once the caliber is fully wound to its maximum, you won't be able to wind the crown any further. Be careful not to overwind your watch, which could damage the mechanism.

The Maréograph complication indicates tides using a small hand around a tides ring indicator located in the sub-register at noon. To make this daily phenomenon visible, the small hand points up when is high tide and down when is low tide. The small hand makes a half-revolution of the tide ring (going from high to low tide) every 6h 12m 7.89s and a complete revolution every 12h 25m 15.79s.

Synchronizing high tide to local time allows tides to be displayed with exact accuracy. To set the tides you must first consult the local tide table and identify the next high tide, e.g. at 7:50 p.m.: 

1. Pull the crown first (Position 1) then turn the crown counterclockwise in order to place the tide small hand in high tide position (at noon). 
2. Then turn the crown clockwise to set the high tide time, in our example we place the Hour/Minute hands at 7:50 p.m.
3. Now that the Hour/Minute hands and the tides small hand are synchronized, simply set the time by turning the crown counterclockwise to maintain the settings.
4. After any adjustment, always return the crown to the pushed position (Position 0). To do this, simply press the crown against the case.

NB: When adjusting the hands of your watch counterclockwise, the tourbillon cage may stop or “jump” due to its gearing. This is a completely normal and it does not affect the proper functioning of your watch or the tourbillon movement.

The CMM.30 is calibrated to achieve a near chronometric precision of -3/+7 seconds/day.

The caliber's maximum variation is -5/+10 seconds/day. Beyond this tolerance your caliber might require servicing.

Designed for everyday life, the CMM.30 tourbillon caliber has robust technical characteristics. Equipped with non-magnetic elements, such as a Swiss-made non-metallic alloy hairspring, a Glucydur balance wheel with a gold adjustment mass and microcomponents machined using LiGA-type technologies, the CMM.30 is thus capable of successfully withstanding a magnetic field of 2,000 Gauss, a real feat for a tourbillon caliber.

The architecture of the tourbillon cage bridge with its variable inertia balance (i.e. absence of racket) and the shock absorbers machined by Kif in Switzerland make the CMM.30 tourbillon caliber insensitive to shocks, vibrations and accelerations up to 39 at 5000 G in all directions.

Discover all caliber components technical specifications in detail.