Rolex Day-Date  40mm President 18kt Yellow Gold with Oyster Architecture Monobloc Middle Case, Super Rare "Green Lacquer" Dial with Bevelled Deconstructed Roman Numerals, 18kt Yellow Gold Fluted Bezel, 18kt Yellow Gold Semi-Circular Three-Piece Links with Concealed Folding Crownclasp, New Generation Manufacture Rolex Calibre 3255 Movement with 70-Hour Power Reserve and Paramagnetic Blue Parachrom Hairspring, Chronergy Escapement with Optimized Energy Efficiency, Screw-Down Crown with Twinlock Double Waterproofness System

The 40mm diameter solid three-body case, gently angled lugs, bracelet, and fluted bezel are polished. There is a Green dial with applied gold Roman numeral hour markers, gold baton hands and a gold center sweep second hand. There is an arched aperture window for the instantaneous day at 12 o’clock, and a rapid-set date aperture window is at 3 o’clock underneath a Cyclops magnification bubble in the crystal. Around the perimeter is a railway-style minute/second scale. It has a 70-hour power reserve at full winding, and it’s water resistant to 100 meters/330 feet. There is a Certified Official Superlative Chronometer (COSC) rating, and the 18mm thick case, dial, and movement are all signed.

This Rolex Day-Date President 40mm 228238 has a mechanical automatic self-winding Rolex caliber 3255 movement. It’s rhodium plated with fausses cotes embellishment, and it’s constructed with 31 jewels, and a "Chronergy" amagnetic lever escapement that optimizes energy efficiency. It has bidirectional self-winding through the perpetual rotor, a Parachrom blue balance spring with an overcoil, and a magnetic oscillator system. The Chronergy escape wheel is skeletonized to reduce any energy loss due to inertia. It has a free-sprung adjustable mass balance, and the mechanism oscillates at a frequency of 28,000 vph (4 Hz).

Reference No. 228238