Seiko Prospex Alpinist Automatic 39.45mm SPB507J1

The Seiko Prospex Alpinist SPB507J1 is a distinctive automatic men’s watch that blends Seiko’s rich heritage with modern horological technology. The Alpinist traces its origins back to 1959, having been developed specifically for adventurers and mountain enthusiasts.

This modern Prospex Alpinist remains true to that sporty spirit while offering a stylish aesthetic that makes it perfectly suited for everyday wear. A true standout feature is its deep green dial, accented by warm, gold-toned details and the signature Alpinist design language. The hands and indices are coated with LumiBrite, ensuring excellent legibility even in low-light conditions. Surrounding the dial is the iconic rotating compass ring—a nod to the Alpinist’s adventurous roots.

The steel case measures 39.5mm in diameter and is finished with Seiko’s robust "Super-Hard-Coating," which provides enhanced protection against minor scratches and signs of daily wear. The scratch-resistant sapphire crystal features an internal anti-reflective coating and includes a magnifying lens over the date display.

At the heart of the Seiko Prospex Alpinist SPB507J1 lies the mechanical Seiko caliber 6R55. This automatic movement is powered by the natural motion of the wearer’s wrist, though it can also be wound manually. A major advantage of the 6R55 caliber is its generous power reserve of approximately 72 hours—meaning that if you take the watch off on a Friday, it will still be running when you put it back on the following Monday. Furthermore, the movement features a stop-seconds function, allowing for precise time setting.

The screw-down crown and a water resistance of 20 bar / 200 meters underscore the robust Prospex character. A portion of the mechanical movement is also visible through the transparent, screw-down case back.

A stylish brown leather strap with a folding clasp completes the design. The combination of green, brown, steel, and gold-colored accents gives this Alpinist its recognizable, classic look.

The watch comes in a luxury gift box.