0673 Watch Mainspring 1.40 x 0.08 x 190 (7 1/2") (Calibers in description)

Dimensions:  1.40 x 0.08 x 190 (7 1/2")

End Type: Tongue End

Material: Swiss Made blue steel

Calibers: 

Eterna 1437, Eterna 1447, Peseux 150, Peseux 150A, Peseux 151, Peseux 151A, Peseux 152, Peseux 152B, Peseux 153, Peseux 154, Peseux 155, Peseux 156, Peseux 157, Silvana 7150