United States. (United States Military Mission in France). 1917. Stamp-less envelope written from 'Mission Francaise/ Camp du Valdahon/ Doubs' addressed to France, endorsed 'C.M.' with Besancon, Doubs date stamp '16th Oct 17' with boxed hand-struck 'Mission Francaise/ Aupres de/ L' Artillerie Americaine' on face in violet. Very fine and scarce item from the American Detachment in Valdahon.