There will be two prizes given to the winners: one for the best philatelic line and one for the best nonphilatelic line.

The Flag stamps have four designs and were issued June 14 in four formats printed by two printers, Ashton Potter and Banknote Corporation of America.

Each of the new Autumn Colors stamps showcases a picture taken by Allen Rokach (1941-2021), a highly acclaimed nature and garden photographer.

Every person touring the truck was given an engraved souvenir sheet showing the White House. The souvenir sheets, which were not valid for postage, were printed aboard the rolling museum.

The three covers marked “Sterilized” are addressed to the same family and were sent between November 1924 and June 1926. The markings are identical, and all are in light purple.

This is Knight’s fourth National Duck Stamp Collectors Society stamp. Her artwork appears on the 2013, 2018 and 2021 NDSCS stamps.

Highlights include a bourse (sales area) of more than 75 dealers from the United States and overseas offering stamps, postal history and supplies; a cachetmakers’ bourse; more than 800 frames of competitive exhibits; and meetings and seminars covering a wide array of topics.

Sony Pictures Studio in Culver City, Calif., played host to the first-day ceremony for the new United States Alex Trebek commemorative forever stamp.

The Collectors Club of Chicago will make yearly donations of $5,000 to the Boston 2026 World Expo.

Also this week, an unusual parachute mail experiment from Fort Campbell in Kentucky, and the hot market for modern Mongolia stamps.

It isn’t that often we get a window into what the Citizens’ Stamp Advisory Committee (CSAC) looks like.

Specifically, the error stamp is an example of the Freedom Flag coil stamp (Scott 5789A) printed by Banknote Corporation of America in rolls of 100.

The American Philatelic Society announced in late June that Anthony S. “Tony” Wawrukiewicz (1943-2023), Janet R. Klug (1950-2023), Herbert A. “Herb” Trenchard (1931-2023) and Kenneth B. “Ken” Grant (1948-2023) were inducted in the society’s hall of fame.

“The round shape of the stamps as well as shadowing and reflection effects give the appearance of three-dimensional pinback buttons,” the USPS said.

The event will occur before the 2024 Negro League Legends Hall of Fame East-West vintage baseball game.

Also this week, a look at the inexplicable U.S. 1985 11¢ Stutz Bearcat coil stamp, and exploring authorized delivery stamps issued by Italy and its colonies.

The design of the stamp shows an eagle soaring above forested mountains and valleys against a yellow and crimson sky.

Events abroad — wars, postal strikes, transportation problems and various disasters — have sometimes prevented mail from being sent beyond the borders of the United States.

The designs of the 10 nondenominated (73¢) commemorative stamps highlight characters, creatures and encounters familiar to players of the fantasy role-playing game.

Whoever becomes member number 30,000 of the American First Day Cover Society will be awarded a credit of 30,000 pennies, or the equivalent of $300.