Glossary
Aperture
A small opening in the dial.
In an aperture watch, various indications such as the month, moon phase, day, date, hour, minute, etc. are visible through these openings.
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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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