6c Orange, 1918 Air Post (C1). Complete left pane of 100 with top plate no. 9155 block of six (Image)

$ 10,780.00

16c Green, 1918 Air Post (C2). Top plate no. 8900 and arrow block of six, lightly hinged, ric (Image)

$ 900.00

16c Green, 1918 Air Post (C2). Top plate no. 8900 and arrow block of six, lightly hinged, ric (Image)

$ 900.00

16c Green, 1918 Air Post (C2). Complete left pane of 100 with top plate no. 8900 block of six (Image)

$ 16,005.00

24c Carmine Rose & Blue, 1918 Air Post (C3). Top arrow, double plate no. and double "Top" blo (Image)

$ 1,150.00

8c Dark Green, 1923 Air Post (C4). Mint N.H., radiant color, proof-like impression, perfectly (Image)

$ 40.00

8c Dark Green, 1923 Air Post (C4). Bottom plate no. 14825 block of six, lightly hinged, detai (Image)

$ 240.00

16c Dark Blue, 1923 Air Post (C5). Mint N.H., rich color on bright paper, Extremely Fine Gem, (Image)

$ 130.00

16c Dark Blue, 1923 Air Post (C5). Mint N.H. bottom plate no. 14830 block of six, intense col (Image)

$ 2,200.00

24c Carmine, 1923 Air Post (C6). Mint N.H., perfect centering with wide margins, vivid color, (Image)

$ 140.00

24c Carmine, 1923 Air Post (C6). Bottom plate no. 14841 block of six, lightly hinged, rich co (Image)

$ 1,850.00

65c-$2.60 Graf Zeppelin (C13-C15). Mint N.H., $1.30 with left plate no. selvage, $2.60 with r (Image)

$ 1,900.00

65c-$2.60 Graf Zeppelin (C13-C15). Mint N.H., choice balanced margins, bright and fresh, Extr (Image)

$ 1,900.00

65c-$2.60 Graf Zeppelin (C13-C15). 65c and $2.60 h.r., rich colors, Fine-Very Fine (Image)

$ 1,155.00

65c-$2.60 Graf Zeppelin (C13-C15). Bright colors, few natural gum creases, Fine-Very Fine (Image)

$ 1,155.00

65c-$2.60 Graf Zeppelin (C13-C15). H.r., rich colors, Fine-Very Fine set (Image)

$ 1,155.00

65c-$2.60 Graf Zeppelin (C13-C15). Rich colors, fresh and Fine-Very Fine set (Image)

$ 1,155.00

65c-$2.60 Graf Zeppelin (C13-C15). Rich colors, Fine-Very Fine (Image)

$ 1,155.00

65c-$2.60 Graf Zeppelin (C13-C15). Mint N.H. plate no. blocks of six, 65c top, $1.30 and $2.6 (Image)

$ 16,950.00

65c Graf Zeppelin (C13). Mint N.H., with left plate no. selvage, rich color, choice centering (Image)

$ 275.00

$1.30 Graf Zeppelin (C14). Mint N.H., with selvage at right, bright color, Very Fine and choi (Image)

$ 650.00

$2.60 Graf Zeppelin (C15). Mint N.H., with right plate no. selvage, rich color on bright pape (Image)

$ 975.00

50c Chicago Zeppelin (C18). Three Mint N.H. plate no. blocks of six, superior centering and c (Image)

$ 2,175.00

50c Chicago Zeppelin (C18). Four Mint N.H. plate no. blocks of six, few natural gum skips, be

$ 2,900.00

50c Chicago Zeppelin (C18). 20 Mint N.H. and nine hinged, bright colors, Fine-Very Fine

$ 2,250.00