Movement: mechanical automatic self winding; 21 jewels; doesn"t use batteries and never needs winding; kinetically powered by body movement of wearerCase: polished stainless steel bezel and armatures; brushed finish sidesCase back: polished stainless steel, windowed, skeleton screw backGlass: high impact, scratch resistant mineral crystalCabochon Crown: stainless steel, ridged screw down pins with hand-cut sapphire gemstonesDial: ivory enamel face with black roman numeralsBracelet: 2 interchangeable black and tan aniline dyed, crocodile embossed leather wristbandsClasps: stainless steel hook clasp, rods, sprung pivots and lug straps accented with sapphire gemstones