Los 521
1920, Landscape and Airplane 15 c. blue, two single stamps tied by violet handstamp "SERVICIO POSTAL AEREO SCADTA BOGOTA" to reverse to cover with horizontal pair Columbia 1920 5 c. blue to Bremen, Germany with date mark from 20.4.1922 and violet Scadta advertising cachet on reverse, stamps with gum spots, otherwise fine
