Cover franked with single 1901 20c black & purple (SG 104) tied by oval SUBADMINISTRACION DE CORREOS DE SANTA ANA cancel with unframed four line 'SUB-ADMINISTRACION DE CORREOS SANTA ANA BENI BOLIVIA SBRE 4 DE 1913' marking on reverse. Addressed to GERMANY routed through the AMAZON basin with Brazilian PORTO VELHO (AMAZONA) cds in purple and RECEPCAO-AMAZONAS (4AS) cds in black on reverse. Very scarce origination.