0551 Watch Mainspring 1.30 x 0.12 x 254 (10") (Calibers in description)
Dimensions: Β 1.30 x 0.12 x 254 (10")
End Type: Double Brace
Material: Swiss Made unbreakable
Calibers:Β
Elgin 10/0 size, 1st, 4th & 5th models, mainspring number 1957, Elgin 18/0 size, 1st & 3rd models, Elgin 16/0 size, 2nd model

Description
Dimensions: Β 1.30 x 0.12 x 254 (10")
End Type: Double Brace
Material: Swiss Made unbreakable
Calibers:Β
Elgin 10/0 size, 1st, 4th & 5th models, mainspring number 1957, Elgin 18/0 size, 1st & 3rd models, Elgin 16/0 size, 2nd model
