This is a beautiful sheet of 4 stamps, issued by St. Thomas & Prince Islands in 2009, displaying Zeppelin airships. Featured on the stamps are the C-7 US Navy airship from 1920 in the Swiss Alps, USS Macon ZRS-5 airship from 1933 in Friedrichshafen, Germany, the LZ 127 Graf Zeppelin passenger airship, M-7 airship from 1914 in Rothenburg, Germany, the Aircraft Development Corporation's ZMC-2 airship from 1929, and founder of the Zeppelin Airship Company Ferdinand von Zeppelin. The sheet is Michel catalog #4063-6, and is Post Office fresh, mint never hinged, and F/VF.