1050 Watch Mainspring 1.70 x 0.095 x 318 (12 1/2")(Calibers in description)

Dimensions: 1.70 x 0.095 x 318 (12 1/2")

End Type: Tongue End

Material: Swiss Made Blue Steel

Calibers: 

Bulova 10W, Cupillard 233, Cyma 418, Cyma 419, Felsa 71, Felsa 72, Felsa 73, Felsa 80, Felsa 84, Felsa 86, Felsa 87, Felsa 88, Felsa 89, Felsa 136, Felsa 138, Felsa 139, Felsa 166, Felsa 167, Felsa 206, Felsa 216, Felsa 240, Felsa 244, Felsa 255, Felsa 268, Felsa 284, Felsa 285, Felsa 286, Felsa 287, Helbros 128, Wittnauer 10F