Product Description
Hampden 18 Size Balance staff part 1720 old number 22BB95 for 18 Size Large 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 1.04mm
Balance arm hole 1.27mm
Roller hole 0.71mm
