SEIKO ASTRON SSE109J1

The SEIKO ASTRON SSE109J1 is a GPS Solar World-Time watch featuring a titanium case and bracelet, a ceramic bezel, and a sapphire crystal with a super-clear coating. It is powered by the Caliber 8X22 movement and adjusts automatically to time zones by receiving GPS signals.

Movement and Power

• Caliber No.: 8X22.
• Movement Type: GPS Solar (powered by light).
• Accuracy: ±15 seconds per month (average, without receiving a GPS signal).
• Power Reserve: Operates for approximately 6 months when fully charged, and up to 2 years in power save mode.
• Functions: Overcharge prevention function and power save function included. 

• Case Material: Titanium with Dia shield coating.
• Case Size:
  • Diameter: 44.8 mm.
  • Thickness: 12.4 mm.
• Bezel Material: Ceramic.
• Glass Material: Sapphire crystal with Super-clear coating (Seiko's proprietary anti-reflective coating).
• Band Material: Titanium.
• Water Resistance: 10 bar (100 meters / 330 feet), suitable for swimming.
• Weight: 111g.
• Luminescence: Lumibrite on hands and indexes for visibility in the dark.
• Case Back: Screw case back.
• Anti-Allergy: The titanium used is designed to be anti-allergic to metal. 

• GPS Controlled Time: Time zone adjustment and automatic time adjustment function via receiving GPS signals from satellites.
• World Time Function: Features compatibility with 40 time zones.
• Perpetual Calendar: The calendar is pre-programmed to be correct until February 28, 2100.
• Satellite Acquisition Status Display Function and Reception Result Display Function.
• DST (Daylight Saving Time): Function for adjusting to daylight saving time.
• In-flight Mode: A function to prevent GPS signal reception when required.
• Automatic Hand Position Alignment Function: The watch can automatically check and correct hand positions.