We verify the perfect rating of the regulating organ. The balance spring assures equal oscillations and determines the precision of the watch. The measurement is made in 6 different positions, simulating average wearing conditions. The watch is monitored fully wound and after running for 2 hours.

We ensure our watches are protected against any water
intrusion. An air test checks the water-tightness of the gaskets, the seals and
the bonding of sapphire crystals on each watch. Watches are placed under
pressures ranging between 1 to 10 atmospheres according to the model’s
specifications.

We test and guarantee the 36 hours power-reserve in different positions. Watches are also wound on a Cyclomotion during 8 hours. This operation tests the good winding of the watch by the oscillating weight.

We control the resistance to shocks. We place the watches loosely in a box running on the Cyclomotion in order to simulate the small shocks a watch undergoes under normal wearing conditions.

We control the functioning of the watch under extreme
conditions. The special alloy that composes the balance spring is very
sensitive to temperature variations. Its dilatation can modify its regulating
action and thereby affect the reliability of the watch. Furthermore the oil
used in the TYPE 3 and the TYPE 5 is also sensitive to temperature variations.
We test the seven bellows used in the watch to compensate for the oil expansion
and contraction. After being placed in an oven at a temperature of 45°C the
watch is chilled to 5°C.

We control each of the visual aspects of the watch: case, case back, dial, straps, buckle or folding claps are checked under a UV light and by magnifying glasses in order to guarantee a flawless watch in terms of aesthetics default or scratches.