Thailand. ( French Occupation of Siam ). 1903. Stamp-less envelope addressed to France endorsed 'Troupes d 'Occupation du Siam' cancelled bu 'Saigon Cochinchin / Corps Exp' double ring with military cachet 'Detachment D'Occupation de Chantaboun-Siam / Le Commandant ' in blue and signed by the Lieutenant with Paris receiver on reverse. Scare item of mail from the French Infantry of the Marine in Chantaboun. Very fine.