1897 Jubilee Issue, 1/2p-$5, complete set, h.r., several well centered including $5, some minor toning affecting lower values, few natural inclusions, otherwise fine-v.f., signed Diena, etc., cat. $7728 (Cat No. 50-65) (Image)

Cat. $7728, Est.US$1,500

1904 stationery entire envelope, 1c green, additionally franked with two horizontal pairs (originally a strip of four) of 20c olive green, exceptionally well centered, v.f., registered from Windsor, Ontario (June 10, 1910), with Detroit arrival pmk (same day) on back, with 2006 Greene Foundation certificate (Cat No. 94) (Image)

Est.US$150

1994 Christmas, unissued 52c denomination, corner margin block of four, never hinged, v.f. (Unitrade 1534ii, CA$800+) (Image)

Est.US$150

1932 (27 July) flown cover to USA, final leg of the Trans-Atlantic flight Germany-Iceland-Canada-USA (Von Gronau) with appropriate cachet, plus "Souvenir of First Through Flight Montreal, Canada", also U.S. franking (10c Lindbergh) added on back and tied by Milwaukee arrival postmark, v.f. (Image)

Est.US$250

1936 2nd Hindenburg Flight from Montreal (May 18) via New York to Frankfurt, with "Via Airship Hindenburg" label, franked on both sides (paying total of 70c), with appropriate transit and arrival pmks, v.f. (Image)

Est.US$300

1936 Hindenburg flight (1 May) from Montreal via New York to Germany, mixed franking with U.S. adhesives (cancelled in New York), appropriate cachet and Frankfurt Hindenburg LZ-129 arrival cachet and cds, some toning and stains, otherwise fine and undoubtedly rare Canada-USA Hindenburg combination, signed Gappe (Image)

Est.US$500

1936 Hindenburg flight from Hamilton, Ontario to London, England, appropriate violet cachet, with Frankfurt arrival and "Mit Luftschiff Hindenburg Befordert" handstamp on back, fine (Image)

Est.US$300

1919 Caribou 3c brown overprinted "'FIRST / TRANS- / ATLANTIC / AIR POST / April, 1919", the so-called "Hawker", lightly hinged, exceptionally well centered, signed on back by the postmaster "J.A.R." (J.A.Robinson), also Giulio Bolaffi and Alberto Diena, with 2023 Greene Foundation certificate. A fresh and v.f. example of this Air Post rarity (the stamp was overprinted for use on mail carried by Harry Hawker and Kenneth Mackenzie Grieve on their proposed non-stop flight across the Atlantic in a Sopwith biplane. The aircraft came down in the sea but the men were rescued and the plane salvaged. Only 200 stamps were overprinted, of which 95 were used on letters, 11 were given as presentation copies, 76 were sold in aid of the Marine Disasters Fund, the remaining 18 were apparently damaged and destroyed) cat. $25000 (Cat No. C1) (Image)

Cat. $25000, Est.US$15,000

1851 3p red, diagonal half used in combination with 6p olive yellow, large margins on three sides, just in at right, bright colors and fresh, tied by grids on small mourning cover to England, St. Thomas, May 21, 1855 pmk alongside, endorsed "per steamer via Halifax", red "Paid Liverpool 17 June" struck on arrival, "British 5d Claim" handstamp, filing folds away from the stamps, fine 7 1/2p rate cover to England (Cat No. 1b,2) (Image)

Est.US$2,500

1859-1951 balance of collection on pages, few early Large Queens used, others unused, with 1912 Edward to 10c, Admirals to $1, sets from 1930s and later, with War Tax, Air Post, Special Delivery etc., fine-v.f. (Image)

Est.US$1,000

1869-1903 group of six covers or cards, with 3c used on registered cover from Cathcard; four covers used in 1903, mainly Yukon River Steamboat usages from White Horse, Y.T. to Vancouver, etc., some with "Independent S.S.Casca-Flying Weekly Between White Horse and Dawson" stationery enclosures, mixed condition, scarce (Image)

Est.US$500

1930s carton with hundreds of flight covers, mostly in plastic pochettes, different franking and destinations, various cachets, also some FAMS from Haiti, Dominican Republic, USA, etc.

Est.US$500