ROLEX REF. 6305, RED DATE STEEL Rolex, "Oyster Perpetual, Datejust, Officially Certified, Chronometer," case No. 146772, Ref. 6305. Made in 1956. Fine and rare, center seconds, self-winding, waterresistant, stainless steel Chronometer wristwatch with red date. Three-body, solid, polished and brushed, screwdown case back and crown, engine-turned bezel, crystal with cyclops lens. Off white with applied steel faceted dart indexes, outer 1/5th seconds track, aperture for the steelrimmed red date. Luminous steel dauphine hands. Cal. Cal. A.296, rhodium-plated, 18 jewels straight line lever escapement, monometallic balance, shock absorber, self-compensating blued steel Breguet balance spring, index regulator.