Issued by the United States in 1987, this 7.1¢ "Tractor 1920s" stamp celebrates the mechanization of American agriculture in the early 20th century. It depicts a vintage steel-wheel tractor, symbolizing the technological shift that transformed farming practices and rural life. Designed for nonprofit organization bulk mail, this definitive stamp is part of the Transportation Series, which honors historical vehicles that shaped U.S. progress. Printed in a striking red tone, it remains a favorite among collectors of Americana and agricultural history themes.