Tucked away in a farm in the peaceful hamlet of Les Barrières, Sophie Cattin Morales practices the art of enamelling in her timeless workshop. As a child she lived on the Les Rosées-Dessous farm that houses the "Ultima Forsan" sun dial dating from 1750. So it was an obvious step to call on her talent to enhance the reproduction of the fresco on the back of the Rudis Sylva watch.

Like a farmer-watchmaker of yesteryear, Sophie, leaning over her window sill, works the enamel bathed in natural light. With her mastery of the traditional technique, she transforms the pieces of raw enamel, grinding them in an agate mortar until the desired grain is obtained. Then she washes them to eliminate any foreign bodies, before finally undertaking the enamelling itself. The enamels are applied using a brush in the champlevés in the gold piece.

Dried out and then fired in a kiln at around 840 degrees, the enamelled half-moon is stoned to obtain a flat surface, and then put back in the kiln to undergo a final operation, known as glazing. After the enamel surface has been glazed to give it a shine, it undergoes a final polish. Making the colours eternal, unalterable by light: this is the power and privilege of the art of enamelling.