A Monobloc case in watchmaking refers to a single-piece case construction crafted from a single block of material, typically metal. Unlike traditional watch cases that consist of multiple components such as a removable case back, bezel, or lugs, a Monobloc case is designed as a unified structure. This design enhances the watch's durability and water resistance by minimizing potential entry points for dust, moisture, and other contaminants. The streamlined construction reduces the need for multiple gaskets and seals, which can lower maintenance demands over time. Monobloc cases are particularly favored in tool watches and high-performance sports models due to their robustness and ability to achieve higher water resistance ratings. The design often reflects a utilitarian or minimalist aesthetic, though it is also adopted by luxury brands for its sleekness and technical appeal. The concept gained prominence in the mid-20th century, with notable implementations by brands like Rolex and Omega, especially in their dive watches. The Monobloc case requires specific servicing techniques since it is not easily dismantled, encapsulating the mechanical movement within its solid shell.