United States. (United States Military Mission in France). Circa 1917. Stamp-less envelope written from 'Mission Francaise/ Corps du Valdahon, Doubs' addressed to Paris with circular 'Mission Francaise/ Aupres de/ L 'Artillerie Americaine/ Le Chef de la Mission' on face in violet. Very fine and scarce item from the American Detachment in Valdahon.