There are few nice labels from Condor Syndikat used in Brazil.
Condor Syndikat was a German trade company, with headquarters in Berlin, that operated airline services in Brazil while also providing aircraft, maintenance and aviation information. It is also the mother company of the Brazilian airlines Varig and Syndicato Condor, which later became Serviços Aéreos Cruzeiro do Sul. They were the two oldest airlines in Brazil. (Wikipedia).
Year: 1928, Gummed. Günter Mair's catalogue no: - BRA-B-3, perforated 11 ¼ , sheets of 25(5x5)
issued for customers in U.S.A. , black/yellow/dark grey-green, 5*****
Year: 1927, Gummed. Günter Mair's catalogue no: - BRA-B-1, perforated 11 ¼ , sheets of 20(4x5), black/yellow/bright green, 5*****
Year: 1935, Gummed. Günter Mair's catalogue no: - BRA-B-8, perforated 10 ¾ , rouletted between
lower label and upper tag, sheets, issued ofr customers in Argentina, intended for use on Zeppelin-mail,
dark blue/white, 5*****