"Movement: mechanical automatic self winding; 21 jewels; doesn't use batteries and never needs winding; kinetically powered by body movement of wearer o Case: polished stainless steel bezel and armatures; brushed finish sides o Case back: polished stainless steel, windowed, skeleton screw back o Glass: high impact, scratch resistant mineral crystal o Cabochon Crown: stainless steel, ridged screw down pins with hand-cut sapphire gemstones o Bracelet: 2 interchangeable black and brown aniline dyed leather wristbands o Clasps: stainless steel hook clasp, rods, sprung pivots and lug straps accented with sapphire gemstones o Dial: ivory enamel face with black roman numerals o Calendar sub-dials: 3 calendar apertures display day, month, AM/PM with stars/sun graphic and 1 numerical month flip dial o Hands: sweep second, minute and hour o Water resistant: to 5ATM (50 meters) Product Specifications: Watch case diameter 1.5"" / Dial diameter 1.25"" / Wristband 8.25"" x .75"" Timepiece weighs 1.06 oz. Watch box measures 8"" x 3"" x 5"" Weighs 1 lb. Includes oak wood box with matte black finish and black felt lining, authenticity card with serial number, 2 leather wristbands and commemorative Steinhausen pin"