1924 (25c) red Laurentide Air Service Ltd., a mint never hinged pane of 20, scarce, fresh and well centered pane with light hinge marks in the 4 corner selvedges, very fine. (Image)

Unitrade $ 4,500

1926 (25c) Elliot-Fairchild Air Service Semi-Official Air Mail, a complete pane of 8 with full selvedge and with varieties in position 2 and 4, mint never hinged, fresh and very fine. (Image)

Unitrade $ 675

Group of Three Semi-Official Air Mail Complete Panes, with CL9 (position 2 has a gum bend and all four corner selvedge pieces are missing, and there is separation between two stamps), CL48 and CL50. All three are mint never hinged and very fine. (Image)

Unitrade $ 924

1926 (25c) Patricia Airways and Exploration Semi-Official Air Mail, a complete pane of 8 with full selvedge, mint never hinged, fresh and very fine. (Image)

Unitrade $ 862

Patricia Airways 10c Type A Overprint in red, with "Small t in to" Variety, mint lightly hinged, from position 8 of the pane. A fresh example of this rare variety, with only two examples reported to date. Accompanied by a 2018 Greene Foundation certificate. Rsv. (Image)

Unitrade $ 3,000

1926 (25c) Patricia Airways Limited Semi-Official Air Mail, a complete pane of 8 with full selvedge, mint never hinged, fresh and very fine. (Image)

Unitrade $ 562

1929 (10c) Commercial Airways Semi-Official Air Mail, a complete pane of 10, with rate and record number in selvedge, unused (no gum) with heavy hinge reinforcement, still very fine appearance. (Image)

Unitrade $ 1,750