Other items – opens in a new window or tab. Be sure to add me to your. Favorites list – opens in a new window or tab. VALJOUX 5,551,555,562 BALANCE COMPLETE FLAT HAIRSPRING INCABLOC PART 721. MOVEMENT PARTS ALSO STOCKED FOR A RANGE OF BRANDS INCLUDING JLC, IWC PP, VACHERON, PIAGET, UNIVERSAL AND MANY MORE….