SEIKO PROSPEX SPB321J1

 Movement
• Caliber Number : 6R35
• Precision : +25 to -15 seconds per day
• Power reserve :  Approx. 70 hours
• Movement type : Automatic with manual winding
• Jewels : 24
• Stop second hand function
• Date display

Case
• Case Material : Stainless steel (super hard coating)
• Crystal Material : Sapphire crystal
• LumiBrite : Lumibrite on hands, index(es) and bezel

Case Dimensions
Thickness : 13.4mm
Diameter : 45.0mm
Lug-to-lug : 52.6mm

Band
• Clasp : Three-fold clasp with secure lock, push button release with extender
• Distance between lugs : 20mm

Other Details
• Water Resistance : 200m
• Weight : 190.0g
• Screw case back
• Screw-down crown
• Unidirectional rotating bezel