A tough one Laurie.
It doesn't
look like a field service post card but it is early in the war.
I've tried many different search terms in English and French but I can't find another example anywhere.
The postmark is interesting as it has Marne at the bottom. The 1st battle of the Marne was September 1914. Very important as it ruined the Schlieffen Plan and saved France from a rapid conquest.
The wording on the card gives me the impression of a morale boosting card/statement, especially using the word 'Souvenir'.
Even the addressee is a toughie but I did find this:
http://archives.ville-saumur.fr/_de...15_07_26.pdfOn page 2, in the second column 2/3rds of the way down there is a reference. They have something to do with research/information of victims/missing persons/refugees.
As a WW1 buff I've enjoyed doing this bit of research and hope it helps
