Swiss Ronda R150 with 25 jewels automaticMovement Country of Origin:SwissCase Measurements:42mmLug-to-Lug Measurements:48mmCase Thickness:14mmCrystal:Sapphire crystal with anti reflective coatingBezel:Sapphire crystal with superluminova indexCrown:Screw down crownBracelet:Stainless steelBracelet Measurements:8.5" L x 20mm WClasp:Fliplock push button solid deployant claspWater Resistance:200 meters - 660 feetWeight:.7 ozAdditional Information:Exhibition case back