5 articles with this tag
A resonance watch runs two independent movements in one case, tuned to synchronize through mechanical vibration. A working dealer's plain-English guide to how it works, where the idea came from, and whether it actually improves accuracy.
A world time watch shows all 24 global time zones at once. Here is the Louis Cottier mechanism behind it, how to read one, and the modern references worth knowing.
The equation of time is the gap between solar time and clock time, and it can run past a quarter of an hour. Here is how the kidney-shaped cam mechanism tracks it, and which watches still do it today.
A perpetual calendar watch knows the difference between April and August without you telling it. Here is the mechanism behind that trick, and why it does not need fixing again until the year 2100.
What is a tourbillon? A working dealer's plain-English guide to watchmaking's most famous complication: the spinning cage, how it was meant to fight gravity, why it barely helps a wristwatch, the flying and multi-axis versions, and whether it is ever worth the money.