Watch Glossary

Mechanism that automatically adjusts for months with different numbers of days without manual correction until year 2100.

Patek Philippe specification for month-change mechanism accuracy in annual calendar calibers

Simplified striking complication that chimes hours and quarters but only on demand.

Rotatable star chart on watch dial showing constellations visible from any date and time.

Display showing remaining energy stored in the mainspring, indicating when rewinding is necessary.

Custom operating system architecture optimized for minimal power consumption and haptic response

Chronograph pusher requiring repeated activation; pre-1970s design characteristic.