0603 Watch Mainspring 1.35 x 0.08 x 240 (9 1/2") (Calibers in description)

Dimensions:  1.35 x 0.08 x 240 (9 1/2")

End Type: Tongue End

Material: Swiss Made unbreakable

Calibers: 

Alpina 646, 821
AS 1240, 1256, 1310, 1346, 1360, 1453
Benrus A6, AB, AG, AI, CY, DC
Bulova 6WMC, 8OR, 8ORC
Concord 686, 687
Cyma 475
Doxa 12, 131
Eberhard 876
Elgin 632
Eterna 1323, 1324
FHF 61, 62-2, 62-2N, 120, 120-1, 123, 123-1, 132, 172, 180, 212, 611, 612
GP 62, 83
Hamilton 602, 604, 610, 674
Helbros 5BH, 229
Lavina 180
Silvana 8240
Tudor 611
Unitas 550, 551, 555
Winton 54, 751-17, 752-17
Wittnauer 6FA, 6TT
Wyler WC33, WO120, 121
Zodiac 834 S, 1240