BBR Count ultra-thin jewelry hollowed out watch. With 1200S full hollow manual winding movement, power storage 72 hours, research and development takes two years. Launched Piaget Aliplano Ultra-thin Watch size 40mm. Case thickness 8.9 mm. The production of this Piaget's unique ultra-thin movement reveals the complexity of the movement while maintaining the hollow-out beauty of the splint bones, which is a great challenge for watchmakers.