This is a somewhat more accurate picture of L59, the Afrika-Zeppelin - I suspect it came from the same site that Anth found.
It's journey was far and away the longest made to that date, with a duration of 95 hours. The airship was the largest flown in WW1 (after two extra hull sections had been added) at 743 feet long - a Boeing 747 is about 220 feet. 5 x 240hp Maybach engines; payload of 52 tonnes.
The crew fell for a false radio message saying that von Lettow-Vorbeck had surrendered and returned to Bulgaria. The ship was later lost in an unexplained fire while attempting to raid Valletta.