Morane fuselage was of welded steel tube. Rear fuselage was covered with fabric. Front fuselage with welded aluminium panels that fitted on the tubular frame. The Frence named this 'contreplaque aluminium'! Anyway, they could be easily removed from the plane! Fokker D-XXIII used the same. but here rear part was monocoque light-alloy construction!
Just before the war before the all-monocoque construction became routine, this 'contreplaque' technique was widely used.