The Seiko Prospex Marinemaster SJE117J1 is a modern reinterpretation of Seiko's first diver's watch from 1965. It features a 39.5mm stainless steel case with a thickness of 12.3mm, housing the automatic Caliber 6L37 movement. This movement offers a power reserve of approximately 45 hours and operates at 28,800 vibrations per hour. The watch includes a box-shaped sapphire crystal with anti-reflective coating on the inner surface, a unidirectional rotating bezel, and a screw-down crown. The dial is aquatic green with a textured horizontal pattern, complemented by LumiBrite-coated hands, indices, and bezel for enhanced visibility. Water-resistant up to 200 meters, the SJE117J1 is equipped with a stainless steel bracelet secured by a three-fold clasp with a secure lock and push-button release with extender. The transparent screw-down case back allows a view of the movement. Reference number: SJE117J1.