Seiko Prospex Silver Dial Men 41.7mm HBB001K1

Capturing the tranquil radiance of pristine white sand coastlines and ISO-certified diving engineering, the Seiko Prospex 2026 Asia-Pacific Limited Edition 41.7mm HBB001K1 completes an exclusive regional collector's trio restricted to just 2,500 individually serialized timepieces. Sculpted in a sharp 41.70 mm surgical-grade 316L stainless steel case inspired by the iconic angular "Samurai" diver silhouette, this professional tool watch showcases an evocative sand-textured silver dial that mirrors sunlight glistening across tropical shores. Framed by a contrasting black unidirectional rotating dive bezel, an impact-resistant Hardlex crystal, an unobtrusive date aperture at 4:30, and high-intensity LumiBrite luminescence across the hands, hour indices, and bezel pip, it is driven by the proven in-house Seiko Calibre 4R35 automatic movement. Completed with a solid stainless steel bracelet featuring an integrated wetsuit diver's extension and 200-metre water resistance, it offers a versatile, monochromatic collector's statement for ocean diving and executive wear.

Key Highlights

• 2026 Asia-Pacific Limited Edition: Exclusive regional collector's release strictly limited to 2,500 individually serialized pieces worldwide, engraved with "LIMITED EDITION" and an individual production serial number on the case back.

• Granular Sand-Textured Silver Dial: Tactile matte silver dial surface depicting the shimmering white coral sands of tropical Asian resort shores, framed by sharp black-bordered luminous indices.

• In-House Seiko Calibre 4R35 Automatic Movement: Proven 23-jewel Japanese mechanical calibre beating at 21,600 vibrations per hour, offering a 41-hour power reserve, manual hand-winding, and second-hand hacking (stop-seconds).

• Iconic Angular "Samurai" Case Architecture: Sharp geometric 41.70 mm stainless steel case profile combining faceted surfaces with an ergonomic 49.50 mm lug-to-lug span.

• ISO-Certified 200-Metre Diver's Water Resistance: Professional 20 bar (200 m / 660 ft) water resistance secured by a knurled screw-down crown and solid screw-down case back.

• Triple LumiBrite Luminescence: High-intensity Seiko LumiBrite applied across the faceted hands, hour indices, and bezel elapsed-time scale for uncompromised visibility in dark ocean depths.

• Unidirectional Rotating Black Dive Bezel: Precise one-way rotating bezel with a 60-minute scale engineered to prevent accidental extension of calculated dive times.

• Diver's Clasp with Wet-Suit Extender: Three-fold stainless steel clasp featuring a dual push-button release, security flap, and fold-out diver's extension for wearing over wetsuits.

• Official Seiko 3-Year Manufacturer Warranty: Fully covered nationwide and internationally under Seiko’s official brand guarantee.

Design & Craftsmanship

"Asian Resorts" White Sand Coastal Inspiration & Tactile Texture

Completing the tropical coastline narrative alongside its yellow and orange limited-edition counterparts, the HBB001K1 captures the crystalline brilliance of white sand beaches under mid-day tropical sun. The dial surface features a fine, granular sand texture finished in shimmering silver-white. Bold trapezoidal and rectangular indices are bordered in crisp black and generously filled with LumiBrite, while the date window is placed discreetly between 4 and 5 o'clock to preserve the balance of the primary hour markers.

Angular "Samurai" Geometry & Wrist Ergonomics

Sized at 41.70 mm in diameter and 12.30 mm in thickness, the case draws directly from Seiko’s famed "Samurai" diver silhouette. Sharp, sword-cut bevels on the lugs and faceted case flanks deliver an aggressive tool-watch presence that wears smaller than its dimensions suggest thanks to compact 49.50 mm lug-to-lug spacing. The high-contrast black anodized dive bezel provides immediate visual distinction against the textured silver dial face.

In-House Calibre 4R35 & True Professional Dive Utility

Beneath the individually serialized screw-down case back beats the in-house Seiko Calibre 4R35 automatic movement, delivering 41 hours of power reserve along with manual hand-winding and second-hand hacking functionality. The 316L stainless steel bracelet features solid three-link construction, a milled folding clasp with dual push buttons, and a fold-out diver’s extension that expands the bracelet instantly to fit over the cuff of a wetsuit.