(C1-C6) 1918, 1923 airmail issues. NH, Fine sets. (Image)

(C5) 16¢ Air Service Emblem issue. Group of six NH copies, half are plate number singles, centered Fine or better. (Image)

(C13) 65¢ Zeppelin. NH, with natural gum bends, a gum skip, and a very light finger print. Bright color, centered near VF. (Image)

(C13) 65¢ Zeppelin issue. Unused OG with a natural bend with a tiny hinge remnant, centered F-VF. (Image)

(C14) $1.30 Zeppelin. NH, with natural gum bends, a crease, and a very light finger print. Fresh color, centered F-VF. (Image)

(C14) $1.30 Zeppelin issue. Unused NH with a natural bend, centered Fine. (Image)

(C14) $1.30 1930 Zeppelin. Mint, og., 2003 PSE (99628) states, “it is genuine unused, og., previously hinged, GRADE XF 90, Mint, OG .” Bright color, centered near VF. (Image)

(C14) $1.30 1930 Zeppelin. Used 1990 PFC (23491) states, “it is genuine with a light diagonal crease at bottom left.” Nice color, centered F-VF. (Image)

(C15) $2.60 Zeppelin. NH, with a natural gum, bright, centered F-VF. (Image)

(C15) $2.60 1930 Zeppelin. OG., 2003 PSE (97217) states, “it is genuine unused, og., previously hinged, GRADE: VF 80, Mint,OG.” However the certificate fails to mention perf gum soaks at left. Very bright, centered VF. (Image)

(C15) $2.60 1930 Zeppelin. Mint, og., 2002 PSE (91491) states, “it is genuine unused, og., previously hinged, GRADE VF-XF 85, Mint, OG .” However the certificate fails to mention a tiny HR, bright color, centered near VF. (Image)

(C15) $2.60 Zeppelin issue. Unused OG with a natural bend and a tiny hinge remnant, centered Fine. (Image)

(C15) $2.60 1930 Zeppelin. Used 1990 PFC (230731) states, “it is genuine with a tiny corner margin crease at bottom right.” Nice color, centered Fine. (Image)