LZ 127 Graf Zeppelin Over Switzerland
The Zeppelin airship LZ 127 Graf Zeppelin flying over Switzerland. The Graf Zeppelin measured 775 feet (237 m) in length, had a diameter of 100 feet (30.5 m), and a gas volume of 3.7 million cubic feet (105,000 m³). Photograph by Walter Mittelholzer, circa 1933-37.
ETH Library, Zurich.