Glossary
Balance cock (modern)
A bridge with a lug anchored to a stud. An index (or regulator) passes over a scale indicating Fast Slow in English, Avance Retard in French.
Related theme:
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.