Bolivia: LAB airmail labels

Here are the old airline issue labels from LAB( Lloyd Aereo Boliviano), Bolivia.
                                                                                                       
Year: 1930, Gummed. Günter Mair's catalogue no: - BLV-B-1, imperforated, issued for first airmail flight La Paz  - Rio de Janeiro, 30.7.1930, black/red/yellow/green/white, 6******

Year: 1937, Gummed. Günter Mair's catalogue no: - BLV-B-2, perforated 10 ¾ , sheets, issued in cooperation with Sindicato Condor, dark blue/white, 5*****