Lot 70371 – 1918-19 Bradbury Wilkinson 10s dull grey blue in block of four and two single on Zeppelin cover

1918-19 Bradbury Wilkinson 10s dull grey blue in block of four and two singles along with three 1s bistre-brown on large commercial envelope to Brazil sent by Graf Zeppelin on the 1933 2nd South America flight, with special cachets in green and red, some minor creasing and soiling as to be expected, an impressive usage.