The auction scheduled for April 4-6 in Costa Mesa, Calif., includes United States, British Commonwealth and worldwide stamps, covers, collections and accumulations.

The March 29-30 auction from the Swedish firm Postiljonen consists of a general sale that features stamps and postal history of Scandinavia and worldwide, and a specialized catalog for part 6 of the Gummesson grand prix d’honneur collection of Finland.

The auctions series will take place March 26-30 at the firm’s galleries in Wiesbaden, Germany.

The auction will take place March 28-29, with the encased postage stamps offered during the auction’s Friday session.

Most of the classic Great Britain stamps offered in the March 19 auction were originally bought in the respective auctions of the Sir Gawaine Baillie collection in 2005 and the William H. Gross collection in 2007.

An upcoming Robert A. Siegel auction of United States stamps includes a rare 1883 American Bank Note Co. special printing.

The popular rarity example in the upcoming auction is described by Kelleher and Rogers as “wonderfully fresh and nicely centered."

This 1935 cover that traveled on a solo Earhart flight from Mexico City is offered in the March 12-13 auction in New York City.

The upcoming sale taking place Feb. 18-22 includes specialized China, Asia and Spain, plus extensive Germany, Europe and worldwide offerings.

The auctions will take place over two days offering German World War II Occupation issues, Great Britain and Western Ukraine.

The oldest family owned and operated stamp auction house in the United States looks for innovations that will strengthen the business while also serving its customer base.

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.