Pierre probably had too much wine at lunch or, after returning to his table he passed number 3 over to the dude who did the numbering and lettering who probably was half lit as well and, either someone in-shop caught it or it was pulled in-house and put in a desk drawer where someone found it a hundred years later...

We had no idea what the bannerette should have read since the CP monogram was unknown until W. Charles found another denomination reading Cercle de la Presse.