Seiko Prospex "Speedtimer" 39.5mm

Seiko Prospex Speedtimer Mechanical SPB513J1 The Seiko Prospex Speedtimer SPB513J1 is a premium mechanical automatic watch that combines timeless aesthetics with advanced functionality. Powered by the reliable 6R55 automatic movement, it offers a power reserve of approximately 72 hours and can also be manually wound. Accuracy is rated at +25/-15 seconds per day. The watch features a refined brown-grey dial with a date display and timing bezel, providing both elegance and utility. LumiBrite treatment on the hands and markers ensures excellent legibility in low light, while the curved sapphire crystal with anti-reflective coating provides clarity and scratch resistance. The stainless steel case is treated with Super-Hard Coating for enhanced durability. Measuring 39.5 mm in diameter, 12.0 mm thick, and weighing 154 g, the watch offers a solid yet comfortable presence on the wrist. The bracelet width is 20 mm, with a total length of 197 mm. Water resistance is rated to 200 meters (20 ATM), and the watch includes magnetic resistance of 4800 A/m. Fitted with a stainless steel bracelet, a three-fold clasp with push-button release, and a screw-down case back, the SPB513J1 is a standout choice for those who appreciate traditional watchmaking, modern reliability, and refined style—all in one.