The Christiaan van der Klaauw Real Moon Stella Nebula has a dial from ammolite, a gemstone formed from 71 million years old shells
Christiaan van der Klaauw caliber CVDK7382 | Automatic | Frequency: 28,800 vph (4 Hz) | Jewels: 35 | Double barrel | Rotor with moon | Hours, minutes, moon phase | Power reserve: 96 hours
.
Watches with the Christiaan van der Klaauw caliber CVDK7382
The moon phase complication of this Christiaan van der Klaauw Real Moon Joure Horizon is so accurate it deviates one day in 11,000 years