Watch Glossary

Quick-set mechanism advancing calendar without advancing hour hand

Simple complication displaying the current date, typically requiring manual adjustment for months with fewer days.

Dual window showing both day of week and date of month simultaneously on the dial.

Subdial showing whether current time is daytime or nighttime

Jumping seconds hand that advances in discrete steps rather than continuously, European term.

Seconds hand that advances in discrete ticks rather than smoothly, pausing between each second.

Chronograph with dial divisions marked in tenths of a second rather than traditional fifths.

Shows time in decimal system dividing the day into 10 hours, used in scientific or historical contexts.

Mechanism mechanically adding or subtracting time from two different sources to derive a third function.

Mechanical display of time using numerals in windows rather than traditional hands.

Two superimposed chronograph hands allowing simultaneous timing of multiple independent events.

Two independent tourbillons rotating in opposite directions for improved chronometric performance.

Displays two different time zones simultaneously, typically with a 24-hour hand tracking second zone.