Rolex Day-Date II 218206 features 41mm President Patinum 950 with Oyster Architecture Monobloc Middle Case, Glacier ‘Ice-Blue’ Diamond Dial with 8 Round Diamond & 2 Baguette Diamond Hour Markers, Smooth Platinum Bezel, Platinum Semi-Circular Three-Piece Links with Concealed Folding Crownclasp President Bracelet, Superlative Chronometer Self-Winding Manufacture Rolex Caliber Automatic Movement. This Rolex Oyster Perpetual Day Date II 218206 has a mechanical automatic self-winding Rolex caliber 3156 (based on the Rolex caliber 3155) movement. It’s rhodium-plated with oeil-de-perdrix embellishment and it’s constructed with 31 jewels, a shock absorber device, and a straight-line lever escapement. It includes a monometallic balance that’s adjusted to heat, cold, and 5 positions, a self-compensating Breguet balance spring, a blue Parachrom hairspring, Microstella regulating screws, and a hacking seconds mechanism for precision time setting. The mechanism oscillates at a frequency of 28,800 vph (4 Hz).
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