Cambodia. (French Indo-China). 1939. Air Mail envelope written from 'Lieutenant Rodger,Camp de Sdok-Ach-Romeas, Combodia' addressed to Paris bearing French Indo-China SG 191, 30c chestnut tied by 'Pnompenh a Mongkolborey' ambulant '23rd Nov 39' with circular military cachet 'Camp de Sdok-Ach-Romeas/ Cambodge/ Le Commandant D'Armes' in violet on face with Phompenh transit on reverse. Very rare item of military mail from Sdok-Ach Camp with the extremely scarce Mongkolborey railway cancel. A unique item.