The Potez X was a three-engined biplane with a fixed nosewheel landing gear supplemented with a tailskid. The first variant was the Potez X A which was powered by three 140 hp (104 kW) Hispano-Suiza 8Aa piston engines, two strut-mounted between the upper and lower wings and one nose-mounted. It had an enclosed cabin for 10 passengers with the pilot in an open cockpit behind the cabin. Later the engines were changed to more powerful Hispano-Suiza 8Ab versions. Two other variants were built with 280 hp (209 kW) Hispano-Suiza 8Bec engines, the X B was a military variant and the X C a commercial variant.