Rolex calibre 2236 automatic movement with center hour
At its heart beats the 4131 manufacture Rolex perpetual movement—a mechanical chronograph propelled by self-winding technology
Rolex calibre 3230 automatic movement with center hour
By eschewing a date complication
screw-down crown and push buttons
Rolex Oyster Perpetual Explorer II - Oystersteel - Black Dial - Oyster Bracelet - 226570 bk Smooth Rolex calibre 2236 automatic movement42mm Oystersteel case, screw down back, screw down crown with twinlock double waterproofness system, fixed bezel with 24 hour graduations, scratch resistant sapphire crystal with cyclops lens over the date, black dial, hour markers set with blue Chromalight, Rolex calibre 3285 self winding movement with second time zone hour hand and instantaneous date, approximately 70 hours of power reserve, Oyster bracelet with flat three piece links, folding