Zeppelin Graf had many flights during 1924 to 1939 but only seven flights have carried a mail from Iran. Up to this date what we have on records are only 10 know Iran Zeppelin covers, therefore extremely rare and collectable.

The Zeppelin flights which carried mail from Iran 
1- LZ 127 First South America Flight 1933 Friedrichshafen to Recife (Pern.) 06,-09.5.1933 
2- LZ 127 Third South America Flight 1934 Friedrichshafen to Recife (Pern.) 23.-26.6.1934
3- LZ 127 Fifth South America Flight 1934 Friedrichshafen to Recife (Pern.) 05.-14.8.1934
4- LZ 127 Sixth South America Flight 1934 Friedrichshafen to Recife(Pern.) 18.-21.8.1934
5- LZ 127 Eighth South America Flight 1934 Friedrichshafen to Recife(Pern.) 15.-18.9.1934
6- LZ 127 Tenth South America Flight 1934 Friedrichshafen to Recife(Pern.) 13.-16.10.1934
7- LZ 129 Hindenburg First North America Flight 1936 Friedrichshafen to Lakehurst 06,-09.5.1936