Ultimate development in the series of high-wing monoplane tourers which began with the Potez 36, the Potez 58 prototype first flew in September 1934. Like its immediate predecessor, the Potez 43, it had accommodation for a pilot and two passengers. The wing retained its Vee-strut bracing, leading-edge slats and folding capability, but the wing root was enlarged, the fuselage and tail unit design further refined, and the divided landing gear strengthened and equipped with spatted wheel fairings as standard.