Glossary
Bent index
The balance spring stud and curb pins are usually within a 90° angle. In a "bent" index, this angle is smaller to reduce the distance between the stud and the pins.
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Research
Research
For research into the first Rieussec chronographs, the Fondation de la Haute Horlogerie wishes to locate this piece, made between 1820 and 1830.
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