Known as the Martinsyde cover (for the aircraft that carried it aloft), it is franked with two examples of the 2¢ carmine red Caribou stamp.

An unused 1897 10¢-on-9-candareen dark green Dragons and Shou stamp from China's Empress Dowager issue hits new territory in Hong Kong auction.

An extraordinary stamp rarity of 19th-century imperial China will be offered during the Jan. 18-20 auction series by Spink China in Hong Kong.

Harmer-Schau Auction Galleries of Petaluma, Calif., will conduct a public auction in three sessions Jan. 11-13.

The Dec. 12 Robert A. Siegel auction of the Richard Drews collection of United States 1861-68 issues offered many important stamps, essays and proofs of that turbulent era, including one of the top U.S. stamp rarities.

Cherrystone Philatelic Auctioneers has scheduled its next public auction for Jan. 8-9, 2019, at its New York City galleries.

Sale opens Dec. 18 with Great Britain and British Commonwealth, Europe and colonies, plus Asia, Africa, Latin America and worldwide airmail postal history.

The San Francisco firm plans two auctions featuring U.S. and worldwide rarities, along with general foreign stamps and postal history.

Unissued Chinese rarities are among the many stamps and postal history items that will be offered during InterAsia's Dec. 10-12 auction series.

Robert A. Siegel Auction Galleries will present the Richard Drews collection of United States 1861-68 issues in a public auction to be conducted Dec. 12.

Cherrystone Philatelic Auctioneers will present its next auction of United States and worldwide stamps, postal history and collections Dec. 4-5.

The Dec. 3-7 auction offers a wide range of material including single-item lots, multiples, large lots and collections.

The Nov. 26-Dec. 1 Corinphila auction in Zurich, Switzerland, is offering a prominent rarity of New Zealand.

The upcoming sale in New York City also includes Confederate States, Hawaii stamps and postal history, other U.S. back-of-the-book material.

Assembled over a period of more than 70 years by an anonymous collector, the Hermione Collection of France will be auctioned Nov. 21-22.

A top rarity offered is a mint example of the 1865 Vancouver Island 5¢ rose imperforate Queen Victoria stamp with Crown CC watermark.

The three-day sale called the Space Exploration Signature Auction Featuring The Armstrong Family Collection Part I will take place in Dallas.

Nearly 3,100 lots are offered over the course of the general sale, which opens with a selection of proofs and essays.

The auctions will take place at the Kelleher and Rogers offices at 35/F Central Plaza, 18 Harbour Road, Wan Chai, Hong Kong.

Amid a packed room, part 1 of Gross’s superlative collection of U.S. stamps/covers was sold Oct. 3, with many realizations far exceeding presale estimates.