Developed on the basis of the Tourbillon Double Balance Spring calibre, this complication opens and closes the dial by the fan-like rotation of two opaque sapphire crystals (FBN Calibre 916.02). A patent has been filed for this invention. The dial window opens on demand. By pressing a push-button placed on the crown, the two opaque sapphire crystals pivot instantly and reveal the secret dial. The dial window also opens automatically or in passing. The mechanism is automatically activated for an hour each day, at the specific time chosen by its owner and adjusted by a watchmaker during movement assembly. Just as when the sun is rising or setting, it takes a full hour for the dial to be fully revealed or concealed. This already complex mechanism outright defies the laws of horological construction. Crafting it calls for meticulous gestures and rigorous testing, and its precision stems from exceptional adjustment.

The Galet Secret is a piece that is unique in terms of both its operation and its aesthetic appeal. The dial is hand-crafted, exclusively on request, in keeping with the finest traditions of watchmaking craftsmanship. The miniature illustrations in grand feu enamel, cloisonné enamel, or set with precious stones, are chosen by the owner. Enamelling is undoubtedly the most refined of the decorative arts. It alone is able to give true light and depth to a décor. This age-old technique uses coloured glass powder mixed with oils and essences. The colours are placed on a gold plate, the dial, and then individually fired in the furnace. The last firing operation works a special magic through the fusion of all the colours and the metal. An authentic miniature is unique by nature.