1399 Watch Mainspring 3.30 x 0.195 x 510 (19 12")(Calibers in description)
Dimensions: 3.30 x 0.195 x 510 (19 12")
End Type: T End
Material: Swiss Made Blue Steel
Calibers:Β
Seth Thomas 18 size, Seth Thomas mainspring number 536

Description
Dimensions: 3.30 x 0.195 x 510 (19 12")
End Type: T End
Material: Swiss Made Blue Steel
Calibers:Β
Seth Thomas 18 size, Seth Thomas mainspring number 536
