Los 525
3 s. on 60 c. brown, two single stamps and registered stamp 20 c. grey in combination with ten stamps Ecuador 5 c. brown, tied by black dated cachet "SERVICO DE TRANSPORTES AEREOS ECUADOR-COLUMBIA GUAYQUIL SCADTA 15.ENE.1929" to large registered cover via Barranquilla to Berlin with arrival mark, cover vertical fold, otherwise fine, scarce franking
