Cambodia. (French Indo-China). 1932. French Indo-China postal stationery envelope 5c violet cancelled by Le Bokor/ Cambodge date stamp with adjacent 'Allez Au Bokor/ Station D' Altitude/ du Cambodge', addressed to Barie, Cochinchine. Lovely use of this scarce slogan on Indo-China postal stationery.
Dessrousseaux cannot be sure of the dates but states used around 1931.