I picked up this letter sheet at Congress the other day. I quite liked it, even though its condition is far from ideal (sorry Michael, but then I paid hardly anything for it!).
I had a quick browse on the net and found that similar items exist. Look here: http://timbreposte.free.fr/mag-timbre/la-semeuse/semeuse-diverses.html
My item has been cancelled on 15-10-1918, the one shown on that website on 13-05-1917. Does anyone know any more about these letter sheets? Were they privately produced or official issues (my copy seems to be issued by "Le Zoni" in Nimes)? When were they issued? And what does "déposé" mean, is that just to do with copyright of the semeuse image? Answers on a letter sheet please (or e-mail will do fine as well!)