Precision Watch Balance Wheel Timing Screw Adjusting Tool for AP Movements. This high-quality tool is designed for fine-tuning the balance wheel timing screws in Audemars Piguet (AP) Caliber 3120, 3126, and 3090 movements. It allows for precise time regulation and movement adjustment, ensuring optimal performance in luxury watches. Designed for AP Cal. 3120, 3126, 3090…