CJE,
Thanks for putting me on the right track naming the Farman 222.
It helped me find this link that exactly describes missions to Germany and Czechoslavkia during the Drôle de Guerre:
http://www.ba123.air.defense.gouv.fr...sk=view&id=265
At least one flight on 22 April 1940 to Prague.
Michal, I hope this answers your question?
Regards,
Leendert