Seiko Prospex Marinemaster SJE099
A tribute to professional-grade diving heritage, the SJE099 reimagines Seiko’s iconic 1965 diver with modern engineering and vintage proportions. Featuring a robust yet refined case design and a high-performance automatic movement, this Marinemaster is ready for the deep and distinguished enough for everyday wear.

Key Features

Authentic Dive Heritage

• 39.5mm stainless steel case with classic tool-watch proportions

• Box-shaped sapphire crystal with anti-reflective inner coating for optimal visibility

• Unidirectional rotating bezel and screw-down crown for dive-ready reliability

Mechanical Precision

• Caliber 6L37 automatic movement with manual winding

• 28,800 vibrations per hour (8 beats/second) for smooth and stable operation

• 45-hour power reserve and 26 jewels

• Accuracy rating of +15 to -10 seconds per day

• Stop second hand function for precise time setting

Built for the Deep

• Water resistance to 200m (660 ft) – compliant with ISO diver’s watch standards

• LumiBrite on hands, indices, and bezel for exceptional low-light legibility

• Screw-down and see-through case back for added protection and appeal

• Magnetic resistance: 4,800 A/m

• Secure three-fold clasp with push-button release and diver’s extension

The Seiko Prospex Marinemaster SJE099 is where heritage design meets modern performance—crafted for serious divers and refined adventurers alike.