German American sea mail, NDL standard stamp D. BREMEN 7.10.36, letter with 50 and 75 Pfg Zeppelin, mailed aboard of the steamer as extremely rare incoming line to the airship LZ 129 HINDENBURG to the return flight the 10. North America flight from Lakehurst to Frankfurt, arrival 12.10.36, further to Wesermuende, scarce combination (former starting price 150)