Product Description
Hampden 18 Size Balance staff part 1721 old number 22BB96 for 18 Size Small collet Single Roller pivot 13
Works for Flat or Breguet Hairspring
Overall Height 5.83mm
Distance from Roller Seat to Pivot 3.65mm
Hairspring Collet hole 0.76mm
Balance arm hole 1.27mm
Roller hole 0.71mm
