Kalle Slaap from Chronoglide in the Netherlands demonstrates the intricate process of static balance staff poising, a critical step for ensuring a watch remains accurate in all physical positions. He explains the use of a specialized poising tool and a spirit level to identify “heavy points” on the balance wheel, which would otherwise cause timing inconsistencies. The tutorial shows how to meticulously remove microscopic amounts of material from the underside of the wheel to achieve perfect equilibrium without affecting the watch’s aesthetic appearance. This technical session highlights the level of precision required to restore mid-20th century movements to their original high-performance standards.
