Based on the Tourbillon Double Spiral movement, this patented complication conceals or reveals the dial thanks to the fan-like rotation of two opaque sapphire crystals. A window opens on the secret dial when the two crystals are made to pivot.
This can be on request using the pusher in the crown, or automatically, once a day at a time chosen by the owner of the watch and set by the watchmaker when assembling the movement. Gradually, like a sunrise or a sunset, over the course of an hour the dial is completely revealed or concealed. Each Secret dial is unique, and is fully personalised to the owner's wishes by masters in miniature painting, grand feu cloisonné enamel, gem-setting or engraving.