Seiko Astron GPS Solar Speed of Light Limited Edition SSH183

The Speed of Light. Limited to 1,200 Pieces.

Light travels at 299,792 kilometers per second — a speed so extraordinary that it bends our understanding of time itself. The Seiko Astron SSH183 captures that energy in a watch that looks like it's already moving. The dial features a new horizontal pattern with intermittent lines, evoking the visual sensation of light streaking at high speed — a bold, dynamic design that sets this piece apart from anything in the standard lineup.

Neon orange accents punctuate the case, bracelet, and details throughout, delivering a high-contrast, sporty aesthetic that commands attention. The two-layered bezel combines black ceramic components with a polygonal decorative edge — a construction exclusive to this limited edition. Black ceramic runs through the bezel and the central row of the bracelet for a cohesive, striking look. Powered by the GPS Solar Caliber 5X83, it self-adjusts to atomic clock accuracy via satellite and runs for approximately 6 months on a full charge. The 43.4mm titanium case with super-hard coating keeps it light and durable. Each piece is individually numbered. Only 1,200 pieces exist.

Precision at the speed of light.

Specifications

• Case Diameter: 43.4mm | Thickness: 13.4mm | Lug-to-Lug: 49.5mm
• Case Material: Titanium with super-hard coating | Ceramic/aluminum bezel
• Crystal: Dual-curved sapphire with super-clear coating
• Bracelet: Titanium with super-hard coating, black ceramic central row | Lug Width: 14mm | Length: 190.0mm
• Dial: Horizontal speed-of-light pattern | Neon orange accents
• Water Resistance: 10 bar (100m)
• Magnetic Resistance: 4,800 A/m
• Movement: GPS Solar Caliber 5X83
• Precision: ±15 sec/month (without GPS signal)
• Power Reserve: Approx. 6 months (fully charged) | 2 years (power save)
• Functions: GPS time adjustment, world time (38 cities), dual-time, chronograph (12hr), perpetual calendar, day, power reserve indicator, DST, in-flight mode
• Weight: 123.0g
• Reference: SSH183

Additional Details

• Brand: Seiko | Collection: Astron
• Limited Edition: 1,200 pieces worldwide | Individual serial number on case back
• Nickel-free construction
• LumiBrite on hands and indexes
• Authorized DePaula Jewelers dealer