China. (Railway Post Offices). 1929. Native envelope bearing SG 315, 4c olive tied by Train Office/ Tcheng/ T'Ai - Houei' with framed 'Chemin de Fer de L' Etat Chinois/ Ligne de Tcheng T' ai/en Houei/ 18 Feb 1929' two strikes in violet on reverse and small boxed vernacular hand-stamp with circular 'Train Letter date stamp.
Ex Pat Clemo.