Model/Reference: Common references for this configuration include 116618LB (40mm) or the newer 126618LB (41mm).Materials: Crafted from solid 18kt yellow gold for both the case and the Oyster bracelet.Bezel: Features a blue unidirectional rotatable bezel with 60-minute graduations, often made of scratch-resistant Cerachrom ceramic.Dial: A deep blue dial with large luminous hour markers and a date window at 3 o'clock, magnified by a "Cyclops" lens on the crystal.