Flag of Earth Postcard - James W. Cadle’s 1970 Abstract Design #1646648 (License: Personal Use)

This 1970 postcard by American designer James W. Cadle features a striking abstract composition: a large blue circle (Earth), a bright yellow quadrant (sun or land), a small white circle (moon), and a black field (space). The reverse side includes printed attribution and standard postcard address lines, reflecting mid-century graphic design principles rooted in symbolism and simplicity.

Used in educational, artistic, or historical contexts-especially in discussions of space-age design, environmental symbolism, or 20th-century visual communication; ideal for museum exhibits, design blogs, or archival collections targeting users interested in graphic history or cosmic iconography.