 It was a four engined monoplane, powered by Hispano-Suiza 12Y engines, with a braced, high aspect ratio wing mounted above the fuselage and a twin tail.It was armed with a dorsal turret carrying two 7.5 mm Darne machine guns, with a further two machine guns in lateral "cheek" barbettes and two in waist positions.After evaluation, a production order for four aircraft was placed, with a further 15 being ordered before the start of the Second World War.