The Seiko SSC917P1 Prospex Black Series Night Speedtimer Chronograph is a solar-powered watch boasting 100m water resistance. Its classic chronograph features a Black/Grey toned dial and a matching stainless-steel case with a three-fold clasp and push-button release. The glass is Curved Sapphire Crystal. This iteration of the Black Series, the Seiko Prospex Black Series ‘Night Speedtimer,’ draws inspiration from night missions and the view through a night scope. With newly developed green ‘Lumibrite Pro’ markers and hands, visibility is enhanced in dark conditions, maintaining consistency in colour regardless of light level. This solar-powered chronograph belongs to the Prospex Speedtimer collection, embodying Seiko’s professional timekeeping heritage. It conveniently charges from both natural and electric light. Powered by the Seiko Solar V192 movement, the SSC917 maintains an approximate accuracy tolerance of +/- 15 seconds per month and a 6-month power reserve once fully charged. Lumibrite ensures visibility at night. Finished in full hard-coated Stainless Steel, it features a pull-out crown, screw case back, Tachymeter function, 24-hour hand, chronograph up to 60 mins in 1/5 second increments, date display, small second hand, overcharge prevention function, and a resuming electric power generation display. Highlights include its classic finish, 39mm case size with curved Sapphire crystal, and solid feel. - Caliber No. V192 - Solar Powered – Powered by any light source - +/-15 seconds a month at normal temperature range (5°C and 60°C) - 6 Months Power Reserve - 39mm Case Size - 13.3mm Case Thickness - Stainless Steel Case and Bracelet - Sapphire with Anti-Reflective Coating on the Inside - Pull out Crown - Stopwatch Measures 60 Minutes In 1/5th Of A Second Increments with Split Time Capability - Power Reserve Indicator - Tachymeter - 100 Meters Water Resistant