IWC, Engineer, model: IW328902, Automatic mechanical, 32111 movement • Dimensions and specifications: 40mm in diameter, 10.7mm in thickness. The case is made of stainless steel in one piece and features an original chain steel bracelet. The bezel with five exposed fixing screws is a signature design of the engineer. • Dial design: Silver-plated checkered grid dial (offset cross pattern, Engineer's classic texture), three-dimensional bar luminous hour markers, single date window at 3 o 'clock, hands and hour markers equipped with Super-LumiNova luminous coating. • Waterproof performance: 100 meters waterproof, meeting the daily swimming and diving wearing requirements. Ii. Movement Configuration (Self-produced 32111) • IWC self-produced Cal.32111 automatic mechanical movement, 21 gemstone bearings, 164 components, frequency of 28,800 vibrations per hour. • Ultra-long power reserve: 120 hours (5 days) of power reserve, can run for 5 days when fully wound, with Geneva waves and fish-scale finishing. It is equipped with a built-in soft iron anti-magnetic inner shell to resist daily magnetic field interference, and features a compact steel bottom cover design.