A bridge in watchmaking refers to a structural component that is crucial for the stability and functionality of a watch movement. It is a flat, rigid piece of metal, typically made from brass or steel, that is mounted onto the main plate of the movement. The primary purpose of a bridge is to hold various components of the movement in place, such as gears, wheels, and pivots, ensuring they remain aligned and function smoothly. Bridges are secured to the main plate using screws and are often designed with precision to accommodate the specific parts they support.

In addition to their functional role, bridges can also be a canvas for decorative elements in high-end watches. Watchmakers may apply intricate finishing techniques such as anglage (bevelling), perlage (circular graining), or Côtes de Genève (Geneva stripes) to enhance the aesthetic appeal of the movement. The design and finishing of bridges can significantly influence the overall craftsmanship and value of a watch.

Bridges are essential for the durability and accuracy of a watch, as they help maintain the correct positioning of the movement's components, reducing wear and tear over time. Their design and execution reflect the technical expertise and artistic sensibility of the watchmaker.