0389B Watch Mainspring 1.20 x 0.105 x 310 (12 1/4 ")(Calibers in description)

Dimensions:  1.20 x 0.105 x 310 (12 1/4 ")

End Type: Tongue   End

Material: Swiss made Unbreakable

Fits Calibers:

AS 1538, AS 1539, AS 1588, AS 1593, Cupillard 238, Cupillard 240, Cyma 65, Durowe 275, Durowe 440, Durowe 441, Durowe 443, Durowe 445, Durowe 446, Durowe 540, Durowe 541, Durowe 543, Durowe 545, Durowe 546, Doxa 71, Gruen 624, Kienzle 071/17, Otero 740, Otero 744, Otero 840, Otero 844, Otero 845, Otero 846, Lanco 550, Lanco 552, Lip R138, Patek 90A, Vulcain 65