here is a low-wing two seat light transport monoplane,designed by Mr. de Lagrevol and Mr. Eugene Porte,
called Lagrevol-Porte Monoplane.
That looks exactly like the SETCA Petrel. Hmm.
It is the same aircraft: When you click on Aviafrance site's icon "Plus d'histoire sur le SETCA LLP "Petrel"" you have the mention "Eugène Porte, De Lagrevol et Laboureix. Détruit dans un accident à Saint-Cyr lors des essais. ".
The right year is 1939;