1st Südamerikafahrt 1931, stage to Rio, cover from Hamburg 23.8. with mop hiluses free cancel and value cancel "000" as well as exhibition commerative cancel 24.8. and on reverse. Interesting variant, pneumatic post transit Hamburg Ellbriefe with time defy transportation traces 4 RM postage with 1 Mk air-mail and 1 RM zeppelin in an unusual mixed franking via Berlin 29.8. with connecting flight to F " 3 - ", altogether ' port with arrival Rio 4.9., two flight cancel vs. a very rare document!