1918, Semi - Official Air Post, The Aero Club of Canada (Toronto - Ottawa), 25c black and red, full original gum with slight spot in the middle, NH, VF, C.v. $900, Est. $250-$300 (Image)

1919, Semi - Official Air Post, The Aero Club of Canada (Toronto - New York), $1 red and blue, nicely centered, full OG, LH, VF, C.v. $350, Est. $250-$300 (Image)

60th Anniversary of Confederation issue. 1927, 1c-12c, complete set of five in vertical imperforated pairs, perfect quality, full OG, NH, VF, C.v. $900, Unitrade C.v. CAD $1,200, Est. $400-$600 (Image)

60th Anniversary of Confederation issue. 1927, Fathers of Confederation, 2c green, top sheet margin Plate No.A-13 block of four, imperforated horizontally, full OG, NH, VF, C.v. $360, Unitrade C.v. CAD$480 as two pairs, Est. $200 -$250 (Image)

60th Anniversary of Confederation issue. 1927, Parliament Building, 3c brown carmine, top sheet margin Plate No.A-3 block of four, imperforated horizontally, full OG, NH, VF, C.v. $360, Unitrade C.v. CAD$480 as two pairs, Est. $200-$250 (Image)

Air Post Semi-Official stamps. 1924, Laurentide Air Service with ''Canada 1924'' added, (25c) red, booklet pane of two values, large part of OG (some paper adhesion on reverse), VF, C.v. CAD$500, Est. $100-$150 (Image)

Air Post Semi-Official stamps. GROUP OF AIR POST SEMI-OFFICIAL STAMPS: 1926-32, 28 stamps, starting with Elliot-Fairchild, representing several plate varieties, such as ''filled wing'' on No.CL9, serif and snow variety on No. CL46, nice quality material, a few without gum, generally full OG, NH or LH, F/VF, Unitrade C.v. CAD$830, Est. $150-$200 (Image)

First Cents issue. 1859, Queen Victoria, two imperforated plate proofs of 1c deep rose, one of which with vertical Specimen overprint in black, printed on India paper, no gum as issued, NH, VF, Unitrade #14P, i, C.v. CAD $500, Est. $180-$250 (Image)

First Cents issue. 1859, Queen Victoria, plate proof of 1c in deep rose, top sheet margin horizontal strip of three with imprint, produced on India paper and mounted on card, no gum as issued, VF, Unitrade #14P, C.v. CAD $750++, Est. $250-$300 (Image)

First Cents issue. 1859-67, Beaver, trial color imperforated proof of 5c in orange vermilion, top sheet margin single printed on India paper, no gum as produced, NH, VF, Unitrade #15TC, C.v. CAD$250, Est. $90-$120 (Image)

First Cents issue. 1859-67, Beaver, trial color imperforated proof of 5c in brown red with horizontal overprint Specimen in black, printed on India paper and mounted on card, no gum as produced, NH, VF, Unitrade #15TCiv, C.v. CAD$250, Est. $90-$120 (Image)

First Cents issue. 1859-64, Queen Victoria, imperforated plate proof of 12½c yellow green with vertical overprint Specimen in carmine, printed on India paper, no gum as issued, VF, Unitrade #18Pi, C.v. CAD $300, Est. $100-$150 (Image)

First Cents issue. 1859-67, Jacques Cartier, imperforated plate proof of 17c in blue with vertical overprint Specimen in carmine, printed on India paper and mounted on card, no gum as produced, VF, Unitrade #19Pi, C.v. CAD$300, Est. $100-$150 (Image)

First Cents issue. 1867, Jacques Cartier, trial color proof of 17c in pale blue, bottom sheet margin horizontal imperforated pair printed on India paper and mounted on card, no gum as produced, NH, VF, Unitrade #19TC, C.v. CAD$600, Est. $200-$300 (Image)

First Cents issue. 1859-64, Queen Victoria, trial color proof of 2c in dark rose, bottom sheet margin horizontal imperforated pair printed on India paper and mounted on card, no gum as issued, VF, Unitrade #20TC, C.v. CAD$600++, Est. $200-$300 (Image)

First Cents issue. 1859, Queen Victoria, imperforated trial color proof of 2c in green, printed on India paper and mounted on card, no gum as issued, VF, Unitrade #20TCii, C.v. CAD$400, Est. $150-$200 (Image)

Historical issue. 1927, Thomas D'Arcy McGee, 5c violet, horizontal imperforated pair, balanced margins, full OG, NH, VF, 250 pairs possible, Unitrade C.v. CAD$240, Est. $90-$120 (Image)

King George V 1930-35 issues. 1930, King George V, Dr. Eckerlin's ''Rotary Intaglio Process'' to mimic the image of Admiral 3c carmine, imperforated essay of reversed (mirrored) design, complete pane of 25, printed on thick ungummed paper, VF and scarce in a complete pane, Est. $600-$800 (Image)

King George V 1930-35 issues. 1932, King George V ''Medallion'' issue, 1c green, horizontal imperforated pair, nice margins, full OG, NH, VF and scarce, only 150 pairs possible, Unitrade C.v. CAD $700, Est. $300-$400 (Image)

King George V 1930-35 issues. 1932, King George V ''Medallion'' issue, 2c black brown, horizontal imperforated pair, well margined item, full OG, NH, VF and scarce, only 150 pairs possible, Unitrade C.v. CAD$700, Est. $300-$400 (Image)

King George V 1930-35 issues. 1935, King George V Silver Jubilee, 1c-13c, complete set of six imperforated plate proofs on India paper mounted on cards, no gum as produced, NH, VF, Unitrade C.v. CAD$750, Est. $250-$300 (Image)

King George V Admiral issue. 1912-24, coil stamps with vertical perforation 8½, complete set of six in horizontal pairs, 1c yellow is Die II, dry printing, 2c green - wet printing, 3c carmine - Die II, dry printing, large part of OG, mostly VF, Unitrade C.v. CAD$660, Est. $100-$150 (Image)

King George V Admiral issue. 1924, coil stamps (sheet forms) 1c yellow and 2c green, two blocks of eight (4x2) imperforated horizontally, ''dry'' printing, nicely centered, full OG, NH, VF, Unitrade C.v. CAD$480++, Est. $200-$250 (Image)

King George V Pictorial issue. 1935, King George V, 1c-8c, set of six values in horizontal imperforated pairs, all with enlarged margins, full OG (8c with slight gum disturbance, counted as hinged), NH, VF and scarce, only 150 such sets possible, Unitrade C.v. CAD$2,550, Est. $800-$1,000 (Image)

King George V Pictorial issue. 1935, King George V, large die proof of the central vignette in oval for 1c-8c denomination, printed on India with ''X-V-114'' Canadian Banknote Co. inscription and mounted on large sunken card, proof size 87x100mm, card size 217x151mm, minor inclusion on card close to lower right corner of the proof, fresh, VF and scarce, NSSC #181dp1, C.v. US$750, Est. $400-$500 (Image)