ROLEX, REF. 69278 LADY DATEJUST DIAMOND and YELLOW GOLD Rolex, "Oyster Perpetual, Datejust, Superlative Chronometer, Officially Certified," case No. 9600290, Ref. 69278. Made circa 1987. Very fine and rare, center seconds, self-winding, waterresistant, 18K yellow gold and diamonds lady's Chronometer wristwatch with date and an 18K yellow gold Rolex partially bark finished President bracelet with concealed clasp. Accompanied by the original fitted box, warranty (now void) and instruction booklet. Three-body, solid, polished and brushed, screweddown case back and crown, bezel set with 40 round diamonds, sapphire crystal with cyclops lens. Champagne set with 10 diamond indexes, aperture for the date. Luminous yellow gold baton hands. Cal. 2135, rhodium-plated, oeil-de-perdrix decoration, 29 jewels, straight-line lever escapement, monometallic balance adjusted to 5 positions and temperature, shock absorber, self-compensating flat balance spring, Microstella regulating screws.