1056 Watch Mainspring 1.70 x 0.10 x 318 (12 1/2")(Calibers in description)

Dimensions: 1.70 x 0.10 x 318 (12 1/2")

End Type: Tongue End

Material: Swiss Made Blue Steel

Calibers: 

Alpina 647, Benrus AJ, Bulova 10AF, FHF 30, FHF 30-1, FHF 31, FHF 55PS, FHF 65, FHF 70, FHF 70-1, FHF 70-1-2, FHF 70-1-2-N FHF 70-2, FHF 70-2N, FHF 90, FHF 701, FHF 701-1-8, FHF 701-2, FHF 701-2N, FHF 702, FHF 707-1-8, FHF 7010, FHF 7011, FHF 7012, FHF 7013, FHF 7014, FHF 7015, FHF 7016, FHF 7017, FHF 7018, Gruen 785, Waltham 1155, Waltham 1157, Wittnauer 11N, Wittnauer 11NC