I emailed magnum.net and asked them and they emailed me back that certain models in the more popular colors are made in China because they cannot keep up with the demand. I am interested in the color Fig and she said that color is made in France and is in stock so I ordered it.
Colors like black are definitely made in China. She said certains colors are made in China and certain colors in France so it varies for example currently Nutmeg is made in France but Pistachio is made in China. She said that contacting Longchamp directly at their store in SoHo , NYC at 866-LONGCHAMP and they can confirm where the bag is made.