Compared with most autogyros of its time it had a very advanced appearance, with a sleek, streamlined fuselage, an enclosed central engine and a three blade rotor on a straight edged, aerofoil section pylon.
It carried swept, oval tail fins taken from the SNCASE SE-100 twin engine fighter at its tips, which were externally braced to the tailplane underside.
Its nosewheel retracted backwards, placing the wheel partly in the fuselage and its leg within a small ventral fairing.
[1] The first prototype, piloted by Stakenburg,[1] flew with a 164 kW (220 hp) Renault 6Q-01 six cylinder, inverted air-cooled inline engine.
However, the company then decided that the post-war market for small commuter autogyros was too limited to proceed, so the SE-700A did not fly and a proposed production series of four SE-702s or 700Bs were not begun.