Seiko SSC917P1 Prospex Black Series ‘Night Speedtimer’ Solar Chronograph ✅±15 seconds per month accuracy (±1 second per day) ✅Calibre V192 ✅Quartz Solar Movement ✅Stainless Steel Case ✅Case Thickness 13.3mm ✅Case Diameter 39mm ✅Case Length 45.5mm ✅Lug Width 20mm ✅Black, Grey Dial Colour ✅Lumibrite on hands and indexes ✅Three-fold clasp with push button release ✅Stainless Steel Bracelet ✅Water Resistance 100m ✅Curved Sapphire Crystal ✅Tachymeter function ✅1 year warranty ✅Packaging: New in box with manual