1927, 1c-12c, imperforate complete set of five in horizontal pairs, nice quality, full OG, NH, VF, C.v. $900, Unitrade C.v. CAD $1,200 (Image)

1927, 1c-12c, complete set of five in vertical pairs imperforate horizontally, full OG, NH, VF, C.v. $900, Unitrade C.v. CAD$1,200 (Image)

1928, Airplane, Angels and Globe, 5c brown olive, vertical pair imperforate horizontally, full OG, NH, VF, C.v. $390, Unitrade C.v. CAD$525 (Image)

1932, blue surcharge 6c on Mercury 5c dark brown, right sheet margin block of four, full OG, NH, VF, C.v. $260++, Unitrade C.v. CAD$400 as singles (Image)

1927, Yukon Airways and Exploration Co. Ltd, reversed image die proof of 25c in black, printed on thick card, size 98x75mm, perfect condition, no gum as produced, NH, VF, Unitrade C.v. CAD$450 (Image)

1928, Airplane, Angels and Globe, 5c brown olive, bottom sheet margin vertical pair imperforate horizontally, full OG, NH, VF, C.v. $390, Unitrade C.v. CAD$525 (Image)

1929, Commercial Airways, Ltd. ''VIA AIR'', (10c) black, pane of ten (no side selvage), stamp on position 2 with broken second ''C'' in ''COMMERCIAL'', full OG, NH, VF and rare multiple, C.v. $1,800++, Unitrade C.v. CAD $2,520, both values as singles (Image)

1929, Commercial Airways, Ltd., ''VIA AIR'', imperforate trial color proofs of (10c) in green, light carmine, yellow and orange, each one has bottom right corner margin, printed on thin white card, no gum as issued, NH, VF, Unitrade #CL47ii, C.v. CAD$1,200 (Image)

1932, black surcharge 6c on 5c brown olive, top right corner sheet margin plate OTTAWA No.A-2. 915A block of eight (4x2), third stamp at the top row with ''Swollen Breast'' variety, full OG, NH (LH on margin), VF, Unitrade C.v. CAD$660 as single stamps (Image)

1935, Daedalus in Flight, 6c red brown, vertical imperforate pair, nice margins all around, full OG, NH, VF and scarce, only 125 pairs possible, C.v. $900, Unitrade C.v. CAD$1,200 (Image)

Air Post Singles and Multiples Group. 1928-46, 15 blocks of four (#C1, C5x2, C6, C7 x2 and etc.), one block of six (#C3) and two singles (#C2), nice and clean unit, full OG, NH or LH (marked as such, usually top stamps of blocks), F/VF, Unitrade C.v. CAD$1,150 (Image)

Zeppelin Flight. 1936 (May 20-23), Airship Hindenburg 2nd NA Return Flight registered cover from Montreal, attractively franked by 11 stamps (9 - on reverse), tied by ''18 MY 36'' ds, NYC ''5.19.1936'' transit and Frankfurt ''(23).5.36'' arrival markings, VF and rare, Sieger #411C, C.v. €500++ (Image)

1919-21, Alcock and Brown Flight, black surcharge $1 on 15c scarlet, and Halifax Airmail, black surcharge with period after ''1921'' $1 on 35c red, nicely centered, large part of OG, VF, C.v. $370, Unitrade C.v. CAD$550 (Image)

1931, Airmail Pictorial issue, imperforate plate proofs of 15c, 50c and $1 in black, complete set of three, 50c with paper maker's watermark, nice margins all around, no gum as produced, NH, VF and scarce, Walsh NSSC #AM7 n, AM8 m, AM9 l, C.v. US$1,640 (Image)

1931, Airmail Pictorial issue, Airplane over Packet Ship, 50c green, vertical imperforate pair, nice margins and post office fresh, full OG, NH, VF and rare, C.v. $1,100, Unitrade C.v. CAD$1,800 (Image)

1931, Airmail Pictorial issue, Trans-Atlantic Flight Routes, $1 blue, vertical imperforate pair, balanced margins and strong color, full OG, NH, VF and rare, C.v. $1,100, Unitrade C.v. CAD$1,500 (Image)

1933, Labrador issue, 10c yellow, vertical imperforate pair, nice margins, full OG, NH, VF, C.v. $300, Unitrade C.v. CAD$400 (Image)

Two-Page Collection. 1931-43, both Pictorial sets, Dornier Flight, Labrador issue, Balbo Flight and St. John's, 15 mint stamps on well-described heavy duty pages, all with full OG, LH or hinged, VF, C.v. $1,029, Unitrade C.v. CAD$1,461 (Image)

1897, Queen Victoria, ½c-$5, complete set of 16 large die proofs, printed on India paper and mounted on sunken cards, approximate proof sizes 65x62mm, card sizes 220x150mm, perfect quality unit, no gum as produced, NH, VF, one of only a handful in existence, Walsh NSSC 36dp1-51dp1, C.v. from US$2,000 to $2,500 ($3), complete unit is obviously priced higher, Est. $20,000-$25,000 (Image)

1859, Beaver, 5c vermilion, nice centering for this issue, intact perforation and full OG, LH, VF, C.v. $800, Unitrade C.v. CAD$800 (Image)

1864, Queen Victoria, imperforate trial color proof of 2c in claret, horizontal pair printed on India paper and mounted on card, both with a dash in lower right ''2'' variety, no gum as produced, NH, VF, Unitrade #20TCi, C.v. CAD $700++ (Image)

1933, blue overprint on Harvesting Wheat 20c brownish red, right sheet margin block of four, top left stamps has broken ''X'' in ''EXHIBITION'' variety, full OG, mainly LH, VF, Unitrade #203, i, C.v. CAD$350 (Image)

1932, King George V, 3c deep red, plate No.2 block of eight (4x2), top left stamp with broken ''E'' in POSTAGE'' (position 87), full OG, NH, VF, Unitrade #192, i, C.v. CAD$300 (Image)

1898, three stamps of 2c black and carmine with sea color in lavender, blue or deep blue, all with full OG, NH, VF, C.v. $325, Unitrade C.v. CAD$630 (Image)

1898, 2c black, deep blue and carmine, left sheet margin block of four, full OG, NH, F/VF (left stamps), C.v. $500++, Unitrade C.v. CAD$630 as singles (Image)