BruNo3156 is in the colors and markings of
Groupe de Chasse 5/1 1n the 1938-39 time frame. I believe the camouflage scheme was applied during the Czechoslovak Crisis of 1939 that led to partial Anglo-French mobilization and culminated in the Munich Agreement of September 1938.
Incidentally, at least one Potez 633 took part in the little-known Franco-Thai conflict of November 1940 to January 1941. The Potez 633 was one of two or three (sources differ) originally purchased by China but seized by the French in Haiphong Harbor. It was used as the personal aircraft of Lieutenant-Colonel Pélisse, the commander of
42éme Groupe Aérien Autonome (one of four French air groups in Indochina in 1940-41). Some sources say the aircraft were 631Cs, but the one photograph I have found is a 633 based on the markings on the vertical stabilizers.
The Franco-Thai air conflict involved a number of interesting airplanes, as did other engagements by the Vichy Air Force (see Pablo’s thread on this at
http://www.papermodelers.com/forum/a...ighlight=Vichy)
Source of Image 1: C-J. Ehrengardt.
Source of Image 2: P.A. Tilley, in MSW, “Vichy Air Force in Indochina.”
Sources:
Armée de l'Air Order of Battle, 1st September 1940, available at
http://france1940.free.fr/vichy/ada_sep.html
Paul Camelio and Christopher Shores,
Armee de L’Air: A Pictorial History of the French Air Force 1937-1945, Carrollton, TX: Squadron/Signal Publications, 1976.
Diane Canwell and Jon Sutherland,
Vichy Air Force at War: The French Air Force That Fought The Allies in World War II(Barnesley, UK: Pen and Sword Aviation, 2011).
C-J. Ehrengardt, “Indochine 39/45: L'incident de Lang-Son,” AeroStories, available at
http://aerostories.free.fr/events/langson/
William Green and Gordon Swanborough, “France’s Forgotten Air War,”
Air Enthusiast 25, August=November 1984, pp. 22-33.
MSW, “Vichy Air Force in Indochina,”
Weapons and Warfare: History and Hardware of Warfare, available at
https://weaponsandwarfare.com/2017/0...-in-indochina/