18k yellow gold case with a 18k yellow gold bracelet. 18k yellow gold with diamond bezel. Silvered opalined dial with blue steel hands and Roman numeral hour markers. Minute markers around the inner ring. Self winding automatic.Scratch resistant sapphire crystal. 18k yellow gold crown with blue sapphire cabochon. Solid case back. Case diameter: 36.6mm. Case thickness: 16.1mm. Water resistant at 30 meters (100 feet). Functions: hours, minutes, seconds. Cartier Ballon Bleu de Cartier Medium 18k Yellow Gold Watch WE9004Z3.