SEIKO PROSPEX SFK001J1

 Movement
• Caliber Number : 5K65
• Precision : ±15 seconds per month
• Movement type : Solar
• Jewels : 3
• Overcharge prevention function
• Quick-start function
• Date display
• 24-hour hand
• Magnetic Reluctance 4,800 A/m

Case
• Case Material : Stainless steel
• Crystal Material : Sapphire crystal 
• Crystal Coating : Anti-reflective coating on inner surface
• LumiBrite : Lumibrite on hands, index(es) and bezel

Case Dimensions
Thickness : 13.2mm
Diameter : 45.0mm
Lug-to-lug : 51.8mm

Band
• Clasp : Three-fold clasp with secure lock, push button release with extender
• Bracelet Length : 200.0mm

Other Details
• Water Resistance : 200m / 660ft diver's
• Screw-down crown
• Screw case back
• Unidirectional rotating bezel

* In an actual product, the case back direction might be different from the photograph.