A column wheel is a crucial component in the chronograph mechanism of a watch, responsible for the precise control and coordination of the chronograph's functions. It is a small, wheel-like structure with columns or teeth around its perimeter, resembling a castle turret. The column wheel orchestrates the start, stop, and reset functions of the chronograph by engaging and disengaging various levers and gears within the movement. When the chronograph pusher is activated, the column wheel rotates, allowing its columns to interact with the levers, which in turn control the chronograph's hands and reset mechanism.

The column wheel is highly regarded for its smooth operation and reliability, often found in high-end and luxury timepieces. Its design allows for a more precise and tactile response when operating the chronograph, providing a satisfying click and immediate action. This contrasts with the cam-actuated chronograph, which is generally less expensive but may not offer the same level of precision and feel. The craftsmanship involved in manufacturing a column wheel is intricate, requiring meticulous attention to detail to ensure flawless performance. As a result, watches featuring a column wheel chronograph are often prized for their technical sophistication and traditional watchmaking excellence.