Longines 290 crown wheel with core 420+423

Longines

Founded in 1832 by Auguste Agassiz, Longines is one of the oldest and most respected Swiss watch brands, known for its elegant timepieces, precision sports timing, and strong aviation heritage. The brand's winged hourglass logo is the oldest registered trademark for a watchmaker. Famous models include the HydroConquest, the Master Collection, and the Spirit, a tribute to pioneering aviators. Longines has produced numerous iconic in-house movements, such as the Calibre 13ZN and 30CH chronographs, highly prized by collectors. Longines continues to embody Elegance is an attitude," blending tradition with contemporary appeal."

Wheel

Wheels are essential rotating components in a watch movement, used to transfer power, motion, and timing between different mechanisms. They appear throughout the gear train, winding system, setting system, calendar, chronograph, and automatic winding works. Wheels may be replaced when teeth, pivots, spokes, or friction surfaces are worn, bent, broken, corroded, or causing poor performance.