SEIKO PROSPEX SPB505J1 ALPINIST AUTOMATIC MEN WATCH

Seiko Prospex SPB505J1 — Alpinist Automatic

The Seiko Prospex SPB505J1 is a dark, composed expression of one of Seiko's most historically significant designs — the Alpinist, originally created in 1959 for Japan's "Yama-otoko," the mountain men of the Japanese Alps. Where the pine green SPB507J1 is the colour most associated with the Alpinist's heritage, the black dial variant presents the same iconic cathedral hands, Arabic numerals, and classic Alpinist logo in a darker, more versatile register — a watch that carries the full weight of 1959 in a palette suited to any occasion.

Powered by the in-house 6R55 automatic calibre with a 72-hour power reserve and hand-winding capability, housed in a super-hard coated stainless steel case under curved sapphire crystal, the SPB505J1 delivers the same performance credentials as the green dial sibling in a black dial configuration that reads equally well in the boardroom or on the trail. The exhibition caseback reveals the 6R55 in action, engraved with the mountain device emblem — the collector's detail that connects every modern Alpinist to the 1959 original. At 39.5mm with a stainless steel bracelet and 200M water resistance, it is the definitive everyday Alpinist for those who prefer black.

Key Features

• Seiko 6R55 automatic movement with manual winding — self-winding with the convenience of hand-winding when needed
• Approx. 72-hour (3-day) power reserve — reliable performance through a long weekend without wearing
• Accuracy: +25/-15 seconds per day — dependable automatic timekeeping
• Black dial with cathedral-style hands and Arabic numerals — the 1959 Alpinist design language in its darkest, most versatile expression
• Classic Alpinist logo from Seiko's earliest Laurel models — heritage branding connecting the modern watch to its 1959 origin
• Curved sapphire crystal — premium scratch resistance and superior optical clarity
• 39.5mm super-hard coated stainless steel case — enhanced durability with a refined, slim profile
• Exhibition caseback with mountain device emblem — admire the 6R55 movement and the collector's detail within
• Date display — everyday practicality built in
• Stainless steel bracelet — durable, comfortable, and corrosion-resistant
• 200M water resistance — built for serious outdoor use
• Made in Japan — Seiko's highest standard of in-house manufacture

Why You'll Love It

The SPB505J1 is the Alpinist for those who want the full heritage of 1959 in a dial colour that works everywhere. The black dial gives the cathedral hands and Arabic numerals a clarity and contrast that the green variant approaches differently — here, the legibility is immediate and the aesthetic is sophisticated without sacrificing the Alpinist's fundamental character. The 6R55 with its 72-hour reserve handles any weekend without wearing, the super-hard coating keeps the case pristine through outdoor use, and the mountain device emblem on the exhibition caseback remains the collector's reward for looking closely. At 39.5mm with 200M water resistance it is genuinely capable outdoors, genuinely refined indoors, and genuinely timeless in a way that few modern watches achieve. The black Alpinist — for those who know what they're looking for.

SPB505J1 vs SPB507J1 — Black or Pine Green?

Both models share identical specifications — the same 6R55 calibre, 39.5mm super-hard coated case, curved sapphire crystal, exhibition caseback with mountain device emblem, date display, stainless steel bracelet, 200M water resistance, and 72-hour power reserve. The difference is entirely in the dial. The SPB507J1 has the pine green dial — the signature Alpinist colour since 1959, the most heritage-faithful and recognisable expression of the design. The SPB505J1 has the black dial — darker, more versatile, and equally faithful to the 1959 design language. Pine green for the heritage collector; black for the everyday wearer who wants an Alpinist that works in any context.

About the Seiko Alpinist

The Seiko Alpinist was born in 1959 — a watch designed for Japan's mountain climbers at a time when domestic watchmaking was finding its identity in extreme environments. The original Alpinist established the cathedral hands, the Arabic numerals, and the compact case proportions that define every Alpinist to this day. Over sixty-five years the design has been refined and updated but never fundamentally altered — because the original solved the problem it was designed for with a precision and elegance that has never been improved upon. The SPB505J1 carries that lineage forward with Seiko's most advanced current automatic calibre and the best materials available, without disturbing a single detail of the design that made it iconic.

The Seiko Prospex Story

Prospex is a combination of the words "Professional" and "Specifications." Seiko Prospex timepieces are designed to be practical, reliable, and durable — built to meet the high standards required in extreme environments for sports lovers and adventure seekers alike. The Alpinist has been part of that story since before the Prospex name existed — a mountain watch that predates the dive watch, the field watch, and the GPS solar by decades, and remains as relevant today as it was when Japan's climbers first strapped it to their wrists in 1959.

Backed by Seiko's official warranty. Authentic Seiko Prospex watch, sold by authorised retailer City Chain Singapore.

Also available in pine green dial — shop the SPB507J1. Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.