Formed 1923 as Zeebrugge Aeronautical Construction Co. (ZACCO), building several prototypes including 2-seat light trainer and 2-seat light cabin monoplane. Renamed 1925 Ateliers de Construction Aéronautique de Zeebrugge (ACAZ), building prototype of 2-seat reconnaissance fighter biplane (early 1926); survived to 1933.