The SEIKO 5 SRPJ45K1 combines robust automatic movement with precision craftsmanship. Powered by the 4R36 caliber, it offers a 41-hour power reserve, manual winding, and a stop second hand function for exact time setting. The stainless steel case measures 42.5mm in diameter and 13.4mm thick, featuring a Hardlex crystal and a unidirectional rotating bezel with LumiBrite illumination on the hands, indices, and bezel for enhanced readability. Its 10-bar water resistance, magnetic resistance of 4,800 A/m, and a secure three-fold clasp with push-button release make it durable and reliable. The watch also showcases a day/date display and a see-through screw case back, reflecting its expert-level design and functionality.