Cover on stationary of Shelters for Disabled Belgian Soldiers franked with a pair of carmine 1F Stanley Sc. 121 and two air mail stamps C1 and C2 cancelled Charlesville (Kasai) Aug. ..1930 and addressed to Lausanne, Switzerland.  Transit cancel Luebo on back.  Cover was sealed with a black wax seal, still intact.  Cover was cut open on top edge.