Airmail, 1918, 16¢ green, o.g., never hinged, precision centering amid large oversized margins, rich deep color, an Extremely Fine to Superb gem. Scott No. C2  $130. $0 (Image)

Airmail, 1918, 16¢ green, centerline block of 4, o.g., hinge remnant at top, deep color, Extremely Fine. Scott No. C2  $300. $0 (Image)

Airmail, 1918, 16¢ green, top margin plate block of 6 with arrow, o.g., never hinged, nicely centered, rich bold color, Very Fine. Scott No. C2  $1,350. $0 (Image)

Airmail, 1918, 16¢ green, neat oval cancel, exceptional centering amid evenly balanced margins, strong bright color, Superb; with 2012 P.S.A.G. Graded certificate (98, SSV $500). Scott No. C2  $35. $0 (Image)