Since the beginning of Seiko in 1881, the company has continued to innovate in line with founder Kintaro Hattori's philosophy to be "Always one step ahead of the rest." In 1924, the company introduced the first wristwatch with "Seiko" on the dial, signifying the beginning of the Seiko brand. The year 2024 marks the 100th anniversary of this landmark event.

Seiko Astron introduces a limited-edition model that commemorates the legacy of Kintaro Hattori. Based on the concept of "brilliance," this limited-edition model is a milestone for the Seiko brand 100th anniversary, which will continue to pursue innovation for a bright future.

Dial / Bezel
Designed of a vivid nighttime scene in which the earth is viewed from an orbiting satellite
The all-black case and bracelet, sunray-patterned dial, and yellow-gold-coloured accents evoke a view of the earth at night as seen from an orbiting satellite, an image that perfectly channels the groundbreaking technology behind Astron GPS Solar.

The two-part bezel consists of a multi-faceted ceramic upper portion and a yellow-gold-coloured titanium frame to create a brilliance that further evokes this shimmering night view.

Bracelet / Crown
Special bracelet and crown made of ceramic
The bracelet's centre links and the tip of the crown are created with ceramic that has a glossy surface, while the outer links are made of titanium with a black super-hard coating.

Case Back
A case back that tells the story of Seiko's founder.
The yellow-gold-coloured case back carries company founder Kintaro Hattori's name and the trademark "S" that he registered in 1900 as a symbol of the Seikosha factory. Just above the trademark appears the phrase that so aptly captured his philosophy for the company.
The words "Limited Edition" and the individual watch's serial number (0001/1000-1000/1000) are also inscribed on the case back.

The 'S' mark; Kintaro's first trademark.
A special pin badge with the trademark "S" is offered with the watch.

Special Box
The watch is offered in a special presentation box with an additional extra-strength silicone strap and a commemorative "S" mark badge.

• Model: SBXC156
• Caliber Number: 5X83
  
• Movement Type: GPS solar
  
• Precision: ±15 seconds per month (±1 second per day)
  
• Power reserve: Operating for approx. 6 months (when fully charged), power save: approx. 2 years
  
• Jewels: 14
  
• Overcharge prevention function
  
• Power save function
  
• Chronograph up to 12 hours in 1/20 second increments
  
• Perpetual calendar to the february 28, 2100
  
• World time function (38 cities)
  
• Dual-time function
  
• Day display
  
• Power reserve indicator
  
• Time transfer function (Switching between the main-dial and sub-dial)
  
• GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment)
  
• Satellite acquisition status display function
  
• Reception result display function
  
• DST (Daylight Saving Time)
  
• Function to prevent the GPS signal reception (in-flight mode)
  
• Automatic hand position alignment function
• Case Size: Thickness:14.1mm, Diameter:43.4mm, Lug-to-lug:49.5mm
  
• Crystal: Dual-curved sapphire crystal
  
• Crystal Coating: Super-clear coating
  
• LumiBrite: LumiBrite on hands and index(es)
  
• Clasp: Three-fold clasp with push button release
  
• Distance between lugs: 14
  
• Water Resistance: 10 bar
  
• Magnetic Resistance: 4,800 A/m
  
• Weight: 124.0g
  
• LIMITED EDITION on the case back
  
• Serial number engraved on the case back
  
• Clasp with Smart Adjuster function
  
• Screw case back