WatchesAtlas / Watch knowledgeThe Watch EncyclopediaUnderstand the details that make a watch.Explore watches ↗Find a term or abbreviationCategoryAll categoriesMovements & mechanismsComplications & displaysCases, dials & braceletsFinishing & craftsmanshipPerformance & measurementModern watch technologyCollecting, condition & careSearchAllABCDEFGHIJKLMNOPQRSTUVWXYZ2 termsClear filtersMovements & mechanismsVerge escapementAn early escapement using pallets on a verge to interact with a crown-shaped escape wheel.↗Movements & mechanismsVertical clutchA chronograph coupling system using friction between surfaces arranged along an axis to engage timing.↗