1936 Zeppelin Hindenburg Germany to Brazil April flown cover

Description

German Zeppelin flown cover flown  on board the Hindenburg zeppelin Germany to Brazil[Brasil] South America 1/4/1936 addressed Rio de Janeiro Brazil .the marks  applied to stamps is Hindenburg  Europa-SudAmerika in black and the correct double circle zeppelin Europa Sudamerika  in red ,RCDS to back in black Aero federal 7?/4/1936

This also the airmail label Mit Zeppelin Europa- Sudamerika to the bottom left front.

The cover has some aging and wear .