SEIKO PROSPEX SUMO SFK003J1

The Seiko Prospex SFK003J1 is a solar-powered GMT diver's watch, part of the "Sumo" series. The watch features a green textured dial, a green aluminum bezel, and is powered by the Seiko Caliber 5K65 solar movement. 

Technical specifications

• Movement: Caliber 5K65, a solar-powered quartz movement with a GMT function.
  • Accuracy: ±15 seconds per month.
  • Power reserve: Approximately 9 months when fully charged.
• Case:
  • Material: Stainless steel.
  • Diameter: 45.0 mm.
  • Thickness: 13.2 mm.
  • Lug-to-lug: 51.8 mm.
  • Weight: Approximately 182 grams.
  • Crown: Screw-down.
  • Case back: Screw-down.
  • Bezel: Unidirectional rotating bezel with an aluminum insert.
  • Water resistance: 200m / 660ft diver's rating.
• Crystal:
  • Material: Sapphire crystal.
  • Coating: Anti-reflective coating on the inner surface.
• Dial:
  • Color: Green with a textured pattern.
  • LumiBrite: Applied to the hands, hour markers, and bezel pip for increased visibility in low light.
  • Functions: Date display and a 24-hour GMT hand for tracking a second time zone.
• Band:
  • Material: Stainless steel bracelet.
  • Lug width: 20 mm.
  • Clasp: Three-fold clasp with a secure lock, push-button release, and extender