The Seiko Prospex SPB519 is an automatic GMT diver's watch. It continues the design of the 1968 Heritage Diver's collection and adds GMT functionality, increased water resistance and an improved bracelet clasp. It was introduced in 2025.
It has a 42mm stainless steel case with a super-hard coating for scratch resistance. The silvery-white dial has a sunray finish. The hour markers and hands are coated with LumiBrite for visibility in low light. A date display sits between 4 and 5 o'clock. A sapphire crystal with an anti-reflective coating covers the dial.
The unidirectional rotating bezel has a blue ceramic insert for measuring elapsed time. A red 24-hour GMT hand tracks a second time zone and can be set independently in one-hour increments. The watch has a screw-down crown and a screw-down caseback.
- Movement
- Seiko Caliber 6R54, automatic with manual winding
- Jewels
- 24
- Power reserve
- Approximately 72 hours
- Functions
- GMT (24-hour hand), date
- Case material
- Stainless steel with super-hard coating
- Case size
- 42mm diameter, 13.3mm thick
- Lug-to-lug
- 48.6mm
- Dial
- Silvery-white, sunray finish
- Bezel
- Unidirectional rotating, blue ceramic insert
- Crystal
- Sapphire with anti-reflective coating
- Luminescence
- LumiBrite on hour markers and hands
- Water resistance
- 300 meters
- Crown and caseback
- Screw-down crown, screw-down caseback
- Bracelet
- Stainless steel, three-fold clasp with six adjustment positions across approx. 15mm