Specification Seamless single block 316L stainless steel Anti-refiective sopphire crystal Screw-in case back Screw-down crown Diameter: 35mm Thickness: 7.65mm Water resistance: SATM /165t. Non-allergenic, food grade silicon rubber Detachable cesign for easy cleansing & total disinfection Movement Swiss Ronda 71S/Rondo 1069 for Ref. NTO1 Function Hour, minute, second, dote (date function except Ref. NT01 Pulse Counteris) Warranty International waranty for three years from dale of purchase