Welcome to GQ’s 201-level Watch Glossary, breaking down the advanced terms and specific references that are essential knowledge for every serious collector.
In 1941, in a show of Katie Ledecky-style dominance, Patek Philippe became the first to release a serially produced watch that combined two of the trickiest functions in watchmaking: the perpetual calendar and a chronograph. In the 85 years since, the brand has perfected this alchemy, and examining the many iterations of this watch is a…

