Brand SEIKO Model No. / Ref. SRP775K1 Series Seiko Prospex Gender Man Driving system Automatic 24 Jewels Hand and automatic winding capabilities Caliber No. 4R36 21,600 vibrations per hour Power reserve approximately 41 hours Case Stainless Steel Caseback Screwdown Caseback Glass material Hardlex Glass Dial color Black Bracelet Stainless Steel Clasp Three fold clasp with secure lock, push button release LumiBrite Hands and Markers Calendar Day and Date display Water resistant 200M / 20 ATM Case diameter 45 mm (without crown) / 48 mm (with crown) Case thickness 14 mm Remark / Features One way rotating elapsed timing bezel with Gold Tone Markers Original Seiko Watch include Box, Manual and Warranty Card for 1 Year