1621 Watch Mainspring 5.50 x 0.21 x 635 (25")(Calibers in description)
Dimensions: 5.50 x 0.21 x 635 (25")
End Type: Hole End
Material: Blue Steel
Calibers:
Baby Ben 61N alarm mainspring number 61N

Description
Dimensions: 5.50 x 0.21 x 635 (25")
End Type: Hole End
Material: Blue Steel
Calibers:
Baby Ben 61N alarm mainspring number 61N
