1869, 500c black, eleven stars, a mint example with part original gum, well centred and with sharp impression, two light h.r., an exceedingly rare stamp to be found sound, nearly always encountered without gum, making this extremely desirable, one of the difficult and sought-after regular stamps of South American philately, with only 1,000 stamps issued, undoubtedly the rarest stamp of Bolivian philately; signed Hassel. Note: Marcos G. Escalier wrote in his Sobohispo catalogue that there is a "mistery of considerable magnitude" to explain the scarcity of this stamp: the most accepted theory is that most of the remaining stamps were destroyed as there was then still a notable quantity available of the same denomination from the previous issue, the 500c "nine stars". Marcos G. Escalier declared in 1988 4,000 stamps to have been issued, but according to later research and the expert Claus Lange, only 1,000 were printed. (Image)

1894 Issue, two interesting postal-history usages, including 2c blue "eleven stars" stationery card from Sucre to Hamburg upfranked with two pairs of 1c bistre, and cover from Sucre to Paris bearing 2c red-orange strip of five, both with Buenos Aires cds in transit on reverse; a rare duo. (Image)

1930 Zeppelin Pan-American Flight. 14 May cover to New York bearing the Zeppelin sets of three and six ("Z" and "Correo Aéreo" surcharges), the latter with the ordinary inks (the 10c 15c and 25c with faults), all tied by La Paz airmail cds's, with Zeppelin cachet in English and Spanish on front, "Lloyd Aereo Boliviano" marking and Friedrichshafen duplex on reverse. (Image)

1930 Zeppelin Pan-American Flight. 14 May postcard to Germany franked by "Correo Aéreo" 15c red and "Z" 1.50b on 15c green, both tied by La Paz airmail cds and "Europe Pan-America Round Flight" cachet, in addition "Correos Bolivia/1er.Serv.G.Z.14-5-30" cachet below, scarce usage on postcard. (Image)

1930 Zeppelin Pan-American Flight. 18 May cover to Germany, bearing marginal "Correo Aéreo" 25c blue with imprint at base, and "Z" 1.50b on 15c pair with sheet margin at right, all tied by La Paz airmail cds's, with two Zeppelin cachets in Spanish and English below, Friedrichshafen cds on back, very fine. (Image)