Chronograph movement Lange L952.1 by A. Lange & Söhne with column wheel control, used in the A. Lange & Söhne Datograph-Perpetual
Column wheel to a wheel of steel in the movement of chronographs, which is equipped with the so-called columns (small turrets). It controls and synchronizes all major switching operations of the chronograph mechanism. Due to the high production costs, the column wheel is considered to be a criterion of value and quality.
Other names for column wheel are “Swiss Castle” and “crown wheel”.