Watch Glossary

Coiled metal ribbon that stores energy to power the entire watch movement.

Mechanical movement requiring manual winding via the crown to store energy in mainspring.

Seiko's hybrid movement combining quartz accuracy with mechanical automatic winding.

Engagement of teeth between two gears; critical for smooth power transmission

Chronometer-grade movement meeting U.S. military specifications for accuracy and shock resistance.

Military specification requiring movement to survive 50G impact without losing chronometer rating.

Wheel rotating once per hour on cannon pinion, drives hour wheel in motion works

Meca-quartz hybrid, mechanical chronograph with quartz timekeeping, battery powered operation

Chronograph mounted on base movement, 7750 on 2824 base, allows customization

Gear assembly converting center wheel rotation to hour wheel and minute wheel motion