GB/T 6877-1986

This standard provides a unified classification system, terminology, and numbering scheme for parts and assemblies used in mechanical timekeeping instruments, specifically wristwatches and lever escapement alarm clocks. It is applied in the design, manufacturing, and repair of these mechanical timepieces to ensure consistent identification and communication of components across the industry. The standard facilitates inventory management, technical documentation, and quality control in watch and clock production facilities.