1543 Watch Mainspring 4.75 x 0.20 x 508 (20")(Calibers in description)
Dimensions: 4.75 x 0.20 x 508 (20")
End Type:Β Tongue End
Material: Swiss Made Unbreakable
Calibers:Β
Looping 50 (time), Looping 51 (time), Looping 57 (time)

Description
Dimensions: 4.75 x 0.20 x 508 (20")
End Type:Β Tongue End
Material: Swiss Made Unbreakable
Calibers:Β
Looping 50 (time), Looping 51 (time), Looping 57 (time)
