Exact, more exact - chronometer. A chronometer is a watch whose precision has been officially tested and certified by an independent testing laboratory. This Certina model has been tested by the Contrôle officiel suisse des chronomètres (COSC), the official Swiss testing authority, and awarded the quality certificate.
Mother of pearl is the inner shell layer of certain molluscs, such as some mussels. As the material is very brittle, it has to be handled extremely carefully. The naturally developed nature of the material and its very individual shimmer and hue make each pearl dial totally unique - no one piece is quite like the next.