Summary
- Seiko’s Night Sky Alpinist SPB531J1 is a European-exclusive limited edition set to release in September
- Housed in a 39.5 mm steel case, the watch features dual crowns, a midnight-blue dial and lume-filled cathedral hands
After unveiling three new Speedtimers watches in collaboration with Datsun, Seiko reveals a new limited-edition Prospex Alpinist model exclusive to the European market. Dubbed “Night Sky,” the new timepiece carries the reference number of SPB531J1. Drawing inspiration from the deep blue heavens above alpine peaks, this new model nods to the original 1959 Alpinist designed for Japanese Yama-otoko mountain guides, while updating its aesthetic for modern explorers.
At its heart lies its 39.5 mm stainless-steel case with pronounced crown guards and a double-crown system, the midnight blue dial features a subtle vertical brushed pattern, dark gray numerals, lume-filled cathedral hands and a cyclops-magnified date window at 3 o’clock. Through the exhibition caseback, owners can admire Seiko’s in-house 6R35 automatic movement, which delivers a 70-hour power reserve and stop-seconds function with an accuracy of –15/+25 seconds per day.
Limited to 3,000 units, the Seiko Prospex Alpinist “Night Sky” is available for inquiry via Seiko’s UK webstore. Set to release in September, the timepiece will retail for £780 GBP ( approx. $1,025 USD).
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