If it is beautifully polished, any metal radiates light and becomes an object of brilliance. The labor and techniques that make this brightness are respected and monetary consideration is paid for them. Various polishing techniques have been studied and used over the long history of watch manufacturing, and “Sallaz polishing*” towers above the others in terms of beauty of finish. The kind of watch design suitable for “Sallaz polishing” was considered. Polishing can be performed without problems for a shape consisting of a simple plane surface and a quadric surface. This solid form consisting of “surfaces” invokes the stone busts that are displayed in art classrooms.

*Sallaz Polishing
A type of mirror polishing technique named after the machine used in the process. Since polishing involves the application of an attachment with the material to be polished fixed to it to a flat rotating plate covered with an abrading agent, it is not suited to surfaces that are concave or those that are cubic. The technique requires an extremely high-level of skill, and the specularity and brilliance of the finish is beyond comparison. Circular and linear polishing motions are generally used, and manipulation of the apparatus in a smooth unbroken movement is essential for the creation of beautiful mirrored surfaces.