Lot
1708 
Airmail, 1930, $2.60 Graf Zeppelin, tied by "Washington D.C., Apr 19, 1930" First Day of Issue slogan machine cancel on round flight cover, purple U.S. and red German flight cachets, signed by Zeppelin commander Dr. Hugo Eckener at bottom center, reverse with green round flight postmark, Extremely Fine, a quintessential $2.60 Graf Zeppelin first day usage signed by Dr. Hugo Eckener; with 2019 P.F. certificate. Scott No. C15 Estimate $750 - 1,000.
Realized: $1,000