Hello,
Currently on ebay is the Flight Book (Carnet de Vol?) of Capitaine Claude Marcel Gircour from his time training at Rayack and with the Groupe Picardie,it also contains other documentation as well as a solitary photo of a Potez 25. Hopefully it is of interest.
https://www.ebay.fr/itm/395180990360...wAAOSwyWRlv-VC
Regards,
Clint