Vacheron Constantin · Manual Wind

4400 AS/270

Vacheron Constantin's standard hand-wound movement with small seconds, derived from the calibre 4000 by adding a seconds train at six o'clock. It runs the Traditionnelle Small Seconds and the Historique American 1921. At 2.8 mm deep across 127 parts, it carries the Hallmark of Geneva, which governs finishing and construction rather than rate.