Austrian Vienna Hofburg card flown aboard the Hindenburg LZ129 airship's 1936 Friedrichshafen Deutschlandfahrt / Germany flight, with LZ129 cachet, Wien / Vienna CDS, and Friedrichshafen cancel from the second ascent on March 26th (Michel 8, unlisted Sieger 402 variant) . '17 CV EUR650 -- only 15 flown on this ascent! Excellent condition as per scans.