He wished to satisfy a French tourist who was sending a postcard inside an envelope for a friend's son (any reference to my situation is purely fortuitous :p). A Moroccan postman at Meknes-Medina office had some difficulties with the inkage of his datestamp.
Four trials on the A5 left side of the cover. Even the last one, bottom right, shows a beginning of wear in the N of Meknes: its oblical bar is shorter and starts low.
Thank you, postman, for your work.