Oyster Perpetual Explorer: Stainless steel case with polished finished edges & a brushed/satin finished top. Polished stainless steel "Twinlock" crown featuring two sealed zones when the crown is screwed down: the first inside the tube of the crown, the second inside the winding crown itself. Smooth polished stainless steel bezel. Bracelet & buckle features: Brushed stainless steel with polished finished edges. Oysterlock double-locking deployant clasp Fitted with the patented Easylink 5mm extension link. Black dial. Hour markers: Long lasting blue luminous Chromalight filled hour markers. Applied polished hour markers in a combination of indexes & Arabic Numerals. Applied polished rimmed triangle 12 o'clock hour marker. Fine printed minutes/seconds track. Polished stainless steel hands with luminous fill. Rolex Caliber 3132, beats at 28,800 vph, contains 31 Jewels & has an approximate power reserve of 42 hours.