Longines 420 stem 401

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."

Stem

The stem connects the crown to the movement and allows the user to wind the watch, set the time, and adjust functions such as the date. It is an important part of the keyless works and must match the movement and crown correctly. Stems are often replaced when broken, worn, cut too short, bent, rusted, or missing.