The wings, made of wood and fabric covered were of constant chord over most of the span, but final sections where the leading edges swept back produced triangular tips.

Thus they were positioned a little above the lower wing, near to the centre of the inner bay in neatly faired nacelles with circular radiators at the front.

The underlying fuselage structure was rectangular in cross-section aft of the leading edge, but faired at its sides and top into a rounder shape.

The passenger cabin, entered via a port side door had tables, armchairs and sliding windows for thirteen, with another three places accessed forward via a 500 mm wide corridor.

The undercarriage was narrow track, with pairs of mainwheels on both sides mounted vertically to the wing and cross braced, with a tailwheel at the rear.

[1] The first flight was made in May 1920, when the aircraft was powered by three identical Salmson 9 Z engines of about 190 kW (255 hp), piloted by Pierre Beauté.

These included the replacement of the single outboard interplane struts by double ones, an exchange of the rectangular central engine radiators for tubular Lamblin ones and the addition of a substantial additional pair of wheels placed vertically below the engine bulkhead to prevent nose-overs.