Lemania S27 ratchet

Lemania

Lemania is a historic Swiss watch movement manufacturer known for its exceptional chronograph calibres and important role in Swiss watchmaking. Founded in 1884, Lemania produced high-quality mechanical movements used by many respected brands, including Omega, Tissot, and Breguet. The company is especially recognized for its reliable chronograph movements, which powered professional, military, and sports watches throughout the 20th century. Today, Lemania is highly regarded by collectors and watch enthusiasts for its technical expertise, durability, and lasting influence on mechanical chronograph design.

Ratchet

A ratchet is a toothed component used in the winding system of a mechanical watch, helping control the winding and release of mainspring power. It often works together with clicks, wheels, and springs to prevent unwanted reverse movement. Ratchets may be replaced when teeth are worn, broken, slipping, corroded, or causing problems with winding efficiency.