0904 Watch Mainspring 1.50 x 0.19 x 420 (16 1/4")(Calibers in description)
Dimensions: 1.50 x 0.19 x 420 (16 1/4")
End Type: Tongue End
Material: Swiss Made blue steel
Calibers:
Longines 17.89M, Longines 17/89-90 ZZ ABC, Longines 18.79N, Longines 18.79N ZZ, Longines 18.80N ZZ, Longines 18.89M, Longines 18.90M,

Description
Dimensions: 1.50 x 0.19 x 420 (16 1/4")
End Type: Tongue End
Material: Swiss Made blue steel
Calibers:
Longines 17.89M, Longines 17/89-90 ZZ ABC, Longines 18.79N, Longines 18.79N ZZ, Longines 18.80N ZZ, Longines 18.89M, Longines 18.90M,
