| 摘要 |
The balance-spring ( 1 ) includes a plurality of coils ( 3 ) of which the end ( 6, 8 ) of the outer curve ( 2 ) is rigidified by deformation in order to define accurately the setting point ( 7 ) of said balance-spring, said deformation being able to be achieved by bending the end ( 6 ) of the outer curve ( 2 ) through 90° in a plane perpendicular to the height of the balance-spring ( 1 ) or by folding down through 180° a portion of the end ( 8 ) of the outer curve ( 2 ) against the inner or outer face of said end ( 2 ).
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