1930, Switzerland flight of the LZ 127 "Count Zeppelin", handing in for transport post office Romanshorn at the 11. V. 30 - and in accordance with handwritten notation of the post office to Friedrichshafen forwarded, transport at the 17. VI as well as the arrival stamp "Zurich airfield 17. VI. 30" allocated, detailed photo expertize H. W. Winner BPP