5/AU/1925 Cochabamba - Sucre first airmail (Mü.5), cover franked with stamp with special overprint for this flight (as usual, uncancelled), Sucre arrival mark, VF quality, rare! (Image)

7/AU/1925 Sucre - Cochabamba first airmail (Muller 5a), cover of VF quality, rare! (Image)

7/AU/1925 Sucre - Cochabamba first airmail (Mü.5a), cover of very fine quality with special cancel of the flight and arrival mark (in blue) applied on front, VF quality, rare! (Image)

14/AU/1925 Cochabamba - La Paz first airmail (Mü.7), cover franked with 2 stamps with special overprint for this flight, one with variety INVERTED OVERPRINT, La Paz arrival mark of the same day, VF quality, rare! (Image)

Cover sent by Zeppelin on 14/MAY/1930 from La Paz to Leipzig (Germany), franked with both 1930 Zeppelin sets, with special violet handstamp, and Friedrichshafen transit backstamp, VF and rare! (Image)

Card sent by ZEPPELIN from La Paz to New York on 18/MAY/1930, excellent quality! (Image)

Cover sent from VALLEGRANDE to Cochabamba, via Santa Cruz, arrival backstamp of 4/SE/1930, LAB flight, excellent quality! (Image)

16/SE/1930 Cochabamba - Germany, cover carried on 5th flight to Rio de Janeiro, VF quality! (Image)

Cover flown from Oruro to Riveralta on 20/MAR/1931 by LAB and from there to final destination (Cobija) by land. Flown by LAB airplane by the route: Oruro - Cochabamba - Todos los Santos - Trinidad - Santa Ana - Guayamerin - Villa Bella - Cachuela Esperanza - Riberalta, and from there by land (the air route to Cobija was established in 1936). It has an unusual rate of 65c. (45c. postage + 20c. LAB airmail fee), the Oruro datestamp is also rare. VF quality! (Image)

Cover flown by LAB from TRINIDAD to La Paz on 15/MAY/1933, franked with 30c. with the rare postmark of Trinidad, arrival backstamp, VF quality! (Image)