Preventing unauthorized modifications to a watch bezel is crucial for maintaining its integrity, value, and functionality. The most common prevention methods are multi-layered, combining physical and technological solutions. A primary physical deterrent is the use of specialized security screws or bolts that require unique, proprietary tools for removal. These tools are not available to the general public, making casual tampering extremely difficult. Another common physical method involves tamper-evident seals or adhesives that break or show clear signs of interference if the bezel is removed. For higher-value timepieces, manufacturers may implement serialized or laser-engraved bezels that are registered to the watch's case, creating a unique identity that is compromised by replacement. Technologically, some advanced systems incorporate electronic sensors within the bezel mechanism. These sensors can detect removal attempts and trigger an alarm or log the event in the watch's internal memory, which can be accessed by authorized service centers. Furthermore, authentication chips embedded in the bezel can communicate with the watch's main movement; if a non-authentic bezel is attached, certain functions may be disabled. Ultimately, a combination of these methods—physical barriers, unique tool requirements, and electronic monitoring—provides the strongest defense against unauthorized bezel modifications, protecting both the manufacturer's design and the owner's investment.