Seiko's Green Alpinist GMT Goes Global: The Prospex HBC007 Is Finally Here

Image Credits- Seiko

For the past three years, if you wanted the iconic green Seiko Alpinist GMT on your wrist, you only had two options: book a flight to Tokyo or pay a stinging premium on the gray market.

When Seiko introduced a mechanical GMT to the beloved Alpinist line back in 2023, the global release felt incomplete. While the rest of the world received the black (SPB379) and blue (SPB377) variations, the legendary sunburst green dial—the colorway that transformed the Alpinist into a cult hero through the SARB017—remained strictly a Japanese Domestic Market (JDM) exclusive under the reference number SBEJ005.

Collectors made their frustrations known. Now, it looks like Seiko has finally listened. Enter the Seiko Prospex Alpinist Mechanical GMT HBC007.

Same Green, Same Guts

Image Credits- Seiko

Functionally and aesthetically, the HBC007 is exactly what fans have been begging for: the SBEJ005 with an international passport.

It keeps everything that made the original release so irresistible. You get that deep, mesmerizing green dial paired perfectly with gilt cathedral hands and applied gold-tone markers. A red-tipped 24-hour GMT hand tracks a second time zone against the outer fixed bezel.

The case dimensions remain firmly in the sweet spot for modern tool watches. Measuring 39.5mm in diameter, 46.4mm lug-to-lug, and 13.6mm thick, it’s crafted from stainless steel treated with a super-hard coating. And yes, the signature inner rotating compass ring—operated via the secondary crown at 4 o'clock, a design nod tracing back to the original 1959 Alpinist—is still intact.

Under the Hood

Inside the HBC007 beats the automatic Caliber 6R54. This reliable traveler's GMT movement provides a generous 72-hour power reserve. Coupled with a curved sapphire crystal (featuring an inner anti-reflective coating), a screw-down crown, and 200 meters of water resistance, this watch isn't just pretty—it's a highly capable field watch built for actual adventuring.

Pricing and Availability

The absolute best part about this release? It’s not a limited edition.

Unlike last year's Asia-only SPB493, the HBC007 is joining the permanent Prospex lineup. It comes paired with a vintage-inspired, dark brown LWG-certified leather strap. No limited edition numbers to fight over, no extreme FOMO, and no immediate flipper markup.

The HBC007 is slated to hit authorized retailers globally in July 2026. While official US pricing hasn't been posted just yet, UK pre-orders are already live at £1,100 (around $1,485 USD), bringing it closely in line with what you'd expect for a premium Prospex GMT.

After three years of waiting, the quintessential green-and-gold traveler's Alpinist is finally ours for the taking.