Seiko Prospex Sea Automatic GMT Diver's 42mm - SPB383J

Reference Number: SPB383J

Inspired by Seiko's legendary 1968 heritage divers, the Seiko Prospex Automatic GMT Divers SPB383J is built for both underwater adventures and global travel.  The watch blends the rugged functionality of a classic Seiko diver with high-end premium finishing and a highly sought-after GMT complication. The watch's sloped, unidirectional ceramic bezel and chunkier knurling give the watch a more modern, premium design compared to other watches at this price range. Powered by the 6R54 automatic calibre, it offers a 70-hour power reserve and supports both self-winding and hand-winding. 

This watch is a masterclass in wrist ergonomics. Designed to sit low and flush against the wrist, it entirely avoids the bulky, top-heavy feel of most dive watches.  The 42mm stainless steel case is paired with a robust bracelet, creating a sleek yet durable profile. Thanks to the reimagined bracelet with a tailored fit, upgraded detailing and an additional durability coating, it conforms beautifully to wrists of all sizes, making it an incredibly comfortable daily driver.

With 200m water resistance, a screw-down crown, and Lumibrite-coated hands and markers, this watch is ready for demanding environments. The GMT hand allows you to track a second time zone, while the bezel provides essential timing functions.

The SPB383J proves you don't have to sacrifice elegance for durability. While it boasts a clean, classic aesthetic, it retains that tough Seiko DNA with a 70 hour power reserve and an in house GMT movement, this watch is perfect whether you're navigating the boardroom or laying on the beach on a tropical vacation.

TECHNICAL DETAILS