Be sure to add me to your. IWC 851,852,8521,853,8531,854,8541,401,402,403 SWEEP SECONDS FRICTION SPRING. Original SWEEP SECONDS FRICTION SPRING PART 471. PLEASE NOTE MORE PARTS AVAILABLE FOR. SO IF THIS IS NOT THE PART YOU NEED PLEASE ASK THANK YOU. MOVEMENT PARTS ALSO STOCKED FOR A RANGE OF BRANDS INCLUDING JLC, IWC PP, VACHERON, PIAGET, UNIVERSAL…