1924 (25c) Light Green Laurentide Air Service Ltd. First Issue, mint hinged with booklet margin at left, very fine and a rare stamp. (Image)

Unitrade $ 2,000

1924 (25c) Dark Green Laurentide Air Services Ltd., a mint never hinged booklet pane of two, with booklet selvedge and glassine inter-leaving, quite fresh and very fine. (Image)

Unitrade $ 487

1924 (25c) Green Laurentide Air Service Ltd. Complete Booklet, with front cover printed in green, plus back cover printed with "Designed and printed by / Dodd-Simpson Press Ltd. Montreal". The booklet contains four panes of 2, each with inter-leaving between (partially stuck to the stamps), fresh and very fine. Staples are quite rusty, still a scarce booklet. (Image)

Unitrade $ 2,000

1924 (25c) Red Laurentide Air Services Ltd., a mint never hinged booklet pane of two, with booklet selvedge and glassine inter-leaving, quite fresh and very fine. (Image)

Unitrade $ 750

Set of Two Different Plate Proofs of the Elliot-Fairchild Air Service Issue, one in red and yellow and one in black and yellow, both mint hinged and very fine. (Image)

Unitrade $ 600

1926 (25c) Ultramarine Fairchild Air Transport Ltd., a mint never hinged complete pane of 10, with all stamps in column 2 inverted, one stamp has a bit of gum disturbance, still a very fine pane. (Image)

Unitrade $ 850

1926 (25c) Patricia Airways "Style One" Set of Four Trial Colour Proofs, all perforated, on gummed canary, buff, green and deep blue paper, all four singles coming from the same position of the sheet (each showing "ED LAK" in margin at left), mint never hinged, a very fine and scarce set. (Image)

Unitrade $ 2,100

1926 Patricia Airways "Style One" with Type A 10c Overprint in Red, a mint never hinged upper margin block of four, very fine. (Image)

Unitrade $ 900

1926 Patricia Airways "Style One" with Type B 5c Overprint Ascending in Black, mint never hinged, with bright colour, fresh and very fine. (Image)

Unitrade $ 412

1927 Patricia Airways and Exploration Issue with Descending Overprint, a mint hinged single with a crease (visible from reverse), else fine appearance and quite rare, with only one pane of 8 known to have been produced. (Image)

Unitrade $ 2,500

1926 Patricia Airways "Style One" with Type B 5c Overprint Descending in Red, a mint never hinged upper left corner single, previously hinged in margin at top, fresh and very fine. (Image)

Unitrade $ 1,125

1926 Patricia Airways "Style One" with Type B 5c Overprint Descending in Red, a mint never hinged left marginal single, fresh and very fine. (Image)

Unitrade $ 1,125

1926 Patricia Airways "Style One" with Type D (5c) Overprint Descending in Black, a mint never hinged lower right corner single, hinged in margin only, fresh and very fine. (Image)

Unitrade $ 2,250

1926 Patricia Airways "Style One" with Type D (5c) Overprint Descending in Black, a mint right sheet margin single, never hinged but with a small speck of missing gum, therefore catalogued as hinged. A fresh and very fine stamp. (Image)

Unitrade $ 1,500

1926 (50c) Patricia Airways "Style Two" without Overprint, a mint never hinged lower right corner single, fresh and very fine. (Image)

Unitrade $ 300

1927 Patricia Airways "Style Two" with 10c Ascending Type A Overprint in Red, mint never hinged, fresh and very fine. (Image)

Unitrade $ 525

1927 Patricia Airways "Style Two" with 10c Ascending Type A Overprint in Red and Inverted Descending Type D Overprint in Black, mint hinged, fresh and very fine. A very rare stamp, the first we have handled and in our opinion the catalogue value does not reflect its rarity, especially as compared to the regular CL22. (Image)

Unitrade $ 2,500

1927 Patricia Airways "Style Three" Rouletted with 10c Ascending Type A Overprint, a mint never hinged lower left vertical strip of three from plate 2, very fine. (Image)

Unitrade $ 540

1927 Patricia Airways "Style Three" Rouletted with 5c Descending Type B Overprint in Black, Red and Green, offered here in three mint never hinged upper left corner pairs (all from the same position), showing three different plate numbers, very fine and a lovely trio. (Image)

Unitrade $ 420

1927 Patricia Airways "Style Three" Rouletted with 5c Descending Type B Overprint in Red and Malformed "O" in Lookout, a mint pane of eight, with top two stamps hinged and hinge in margin, leaving the bottom 6 stamps NH. The lower left stamp shows the "Malformed O in Lookout" variety. The pane has been folded vertically between the two columns, not affecting the stamps and is very fine. (Image)

Unitrade $ 1,245

1927 Patricia Airways "Style Three" Rouletted with 5c Ascending Type C Overprint in Black, Red and Green, offered here in three mint never hinged upper left sheet margin singles (all from the same position), red overprint is hinged in margin, green overprint has a light gum disturbance, very fine and a lovely trio. (Image)

Unitrade $ 547

1927 Patricia Airways "Style Three" Rouletted with 10c Ascending Type A Overprint in Red and 5c Descending Type C, 34 mm Overprint in Black, a mint never hinged lower right corner single, very fine and fresh. (Image)

Unitrade $ 225

1927 Patricia Airways "Style Three" Rouletted with 10c Ascending Type A Overprint in Red and Descending Type D Overprint in Black, a mint never hinged (hinged in margin only) lower left corner vertical pair, very fine and fresh. (Image)

Unitrade $ 750

1927 Patricia Airways "Style Three" Rouletted with 10c Ascending Type A Overprint in Red and Descending Type D Overprint in Purple, a mint never hinged upper left corner single, left margin has gum dulling, else very fine. (Image)

Unitrade $ 375

1927 Patricia Airways "Style Three" Rouletted with (5c) Type D Inverted Overprint in Black, Purple and Green, green overprint in upper left vertical pair, black overprint in a lower left vertical pair and purple overprint in two corner singles, all stamps are never hinged, with some light hinging in margins. Very fine and fresh. (Image)

Unitrade $ 765