1056 Watch Mainspring 1.70 x 0.10 x 318 (12 1/2")(Calibers in description) Rolex® 2230 The distance from the center

The distance from the center to the small second pinion is 6

fits tube 2

Roseba (RW) 50

Pierce 608

1056 Watch Mainspring 1.70 x 0.10 x 318 (12 1/2")(Calibers in description) Rolex® 2230 The distance from the centerDimensions: 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,