Cover franked with pair 1939 5c dull violet (SG 374) plus pair 1940 20c bright rose 'Revenue' issue (Hilchey & Ackerman #57, left hand stamp torn at left) both pairs cancelled by fine strikes of three line TIAHUANACU FRANCA BOLIVIA cancel in purple. Addressed to ACHACACHI with LA PAZ transit mark on reverse. A rare cover.