Airmail, 1918, 6¢ orange. Top margin plate block of 10 with arrow, o.g., never hinged, beautifully centered, radiant color, fresh and Extremely Fine, choice so nice. Scott No. C1  $1,530. $0 (Image)

Airmail, 1918, 6¢ orange. Centerline block of 4, o.g., never hinged, choice centering, fresh with bright color, Extremely Fine, a premium centerline block. Scott No. C1  $480. $0 (Image)

Airmail, 1918, 6¢ orange. Block of 4, o.g., never hinged, strong color, mixed centering, F.-V.F. overall. Scott No. C1  $480. $0 (Image)

Airmail, 1918, 6¢ orange. Plate block of 6 with arrow, o.g., never hinged (natural gum bends), bright color, F.-V.F. Scott No. C1  $1,050. $0 (Image)