1918 25c Red and Black Aero Club of Canada Issue, mint hinged with a few slightly rounded perfs at right, still very fine. (Image)

Unitrade $ 650

1918 25c Aero Club of Canada Semi-Official Tête-Bêche Pair on Off-White Paper, mint with full original hinged gum (small hinge used to reinforce separation at top), very fine. This is the same paper as was used to print the CLP1 stamps. (Image)

Unitrade $ 2,000

1918 25c Aero Club of Canada Semi-Official Forgery, very similar to the issued stamp but with no red colour, this one without gum with a small "reprint" notation on back, very fine and rare. (Image)

Est $ 100

1918 25c Aero Club of Canada Semi-Official Tête-Bêche Pair on Off-White Paper, mint with full original hinged gum (hr), very fine. This is the same paper as was used to print the CLP1 stamps. (Image)

Unitrade $ 2,000

1919 Aero Club of Canada Proof of Frame Design in Red, printed on card measuring 85 x 107 mm, and very rare, with only 4 known examples, as stated by collector Bob Jamieson about 40 years ago, and the Cornelius sale in 1971 and 1972 had only one in each sale. Fresh, very fine and desirable. (Image)

Unitrade $ 2,000

1919 Aero Club of Canada Proof of Frame Design in Black, printed on card measuring 45 x 67 mm, and extremely rare, with only 2 known examples, as stated by collector Bob Jamieson about 40 years ago. Fresh, very fine and desirable. (Image)

Unitrade $ 2,500

1919 $1 Aero Club of Canada - Toronto to New York, mint with full original hinged gum. The stamp has bright colour and very fine appearance, but has toning spots on back. (Image)

Unitrade $ 500

1924 ($1) Black on Red Estevan to Winnipeg Promotional Semi-Official Issue, a mint lightly hinged pane of two, with top stamp showing the "wide spacing between "ew" variety, with owner's pen mark on back of top stamp, fresh and very fine. Rare, as only 19 panes remained at the time, not many remain unsevered. (Image)

Unitrade $ 2,250

1928 ($1) Red on White Moose Jaw Flying Club Semi Official Issue, mint lightly hinged, fresh and very fine. A very rare stamp in this condition, as only 200 stamps were printed, and 116 were used on cover, with two strips of 5 known, leaving a potential 29 stamps remaining. Very rarely is this stamp ever offered, especially in this lovely condition. (Image)

Unitrade $ 3,500