Germany 1929, LZ 127 First American Flight, to USA, cover franked 4m. C367, it also has the red interruption of flight cachet "Beforderung-verzogert wegen Abbruchs der 1. Amerikafahrt" and blue flight cachet, Sieger 26A CV €100+, New York arrival cds. on back.  Excellent. Estimate $150 - 200.