Vacheron Constantin Traditionnelle Moon Phase Watch, 36mm Mother Of Pearl Dial, 83570/000R-9915This 18K 5N rose gold watch is set with 81 round cut diamonds and a precision moon phase. Set at the center of its mother of pearl dial, the moon phase features a star studded sky whose color is picked up subtly by the alligator strap. This poetic complication only needs adjusting every 122 years. The openworked caseback reveals the exceptional finishes of the manually wound mechanical movement.