[Bertrand H]

Thanks Ed

#2048 link 3 : not Chateau-Thierry and most of the photos captionned by the seller are did at Auxerre-Moneteau ; here is the Breguet 27 n°99 of Section Avions de Sondages Météorologiques n°1

Links 4 & 5 : Potez 621 n°16 of GAT II/144 ex F-AOTV "Alcyon" of Air-France

Some photos are page 62 of the book Du FW 190 au NC 900 - Usines souterraines et blindées en France by Philippe Couderchon v& René Bouvier-Belleville. (Lelapresse 2018)