0231 Watch Mainspring 1.10 x 0.09 x 216 (8 1/2 ")(Calibers in description)

Dimensions:  1.10 x 0.09 x 216 (8 1/2  ")

End Type: Tongue End 

Material: Swiss Made blue steel

Fits Calibers:

Alpina 711, AS 555, AS 815, AS 846, AS 869, AS 878, AS 885, AS 921, AS 1092, Bulova 6K, Buren 300, Buren 301, Gruen 106, Gruen 107, Gruen 109, Gruen 137, Gruen 305, Gruen 306, Gruen 685, Gruen 686, Gruen 1067, Gruen 1077, Junghans 78, Lanco 59, Lanco 69, Lanco 159, Lanco 522, Lanco 5159, Sonceboz 255