And what about Orléans-Bricy?
Could be 5./JFS 5 too, but looking at the picture #25, post #2, looks like JÜSt or JÜ.Gr. since we haven't date: and it's like in a book:
Aircraft used:
Bf 109, Bloch 152, Bloch 155, D.520 etc...
see here:
http://www.ww2.dk/air/jagd/jagdlehrer.html and here
http://www.ww2.dk/air/schule/jfs5.htm in particular the moment they received the Bf 109 F-2.
Cheers, Franck.