Airmail, 1933, 50¢ "Chicago" Zeppelin. O.g., never hinged, beautifully centered amid large margins, lovely rich color, Extremely Fine and choice; with 2006 P.F. graded certificate (XF 90). Scott No. C18  $100. $0 (Image)

Airmail, 1933, 50¢ "Chicago" Zeppelin. O.g., never hinged (no gum skips), Extremely Fine. Scott No. C18  $100. $0 (Image)

Airmail, 1933, 50¢ "Chicago" Zeppelin. 2 singles, fresh and nicely centered, o.g., one never hinged, other h.r., F.-V.F. Scott No. C18  $155. $0 (Image)

Airmail, 1933, 50¢ "Chicago" Zeppelin. Block of 8, o.g., never hinged (no bends or skips), nicely centered throughout, bold color, fresh and Very Fine. Scott No. C18  $800 for singles. $0 (Image)

Airmail, 1933, 50¢ "Chicago" Zeppelin. Block of 4, neat mute double oval cancels, well centered, Very Fine. Scott No. C18  $290. $0 (Image)