Worldwide sale. Door knobs: Art Deco. 10 old oval door knobs in white porcelain set in a bronze ferrule. A square hole of 6 mm on each side for fixing. Good condition. 4 olives measure: 6.5 cm by 4.5 cm. 6 other olives measure: 6 cm by 4 cm. Total height with the ferrule: 5 cm. Very beautiful handles for beautiful doors.