Cover with 'EXPRESSA' handstamp in purple at top left franked with 1920 300rs olive grey 'Industry' issue, 1925 1000rs claret 'Ruy Barbosa' issue and pair 1927 1000rs carmine CONDOR issue (SG 332, 437 and Sanabria #C3) all tied by large oval CORREIO AEREO RIO DE JANEIRO cancel in purple dated JAN 21 1928. Flown by CONDOR in the transition period of ownership with fine strike of the rare CONDOR SYNDIKAT cds dated 19 JAN 1928 in bright purple on front. Addressed to PORTO ALEGRE with arrival cds on reverse. Possibly a survey flight of some sort. Very scarce.