Issued by Australia, this 20 cents commemorative stamp depicts the historic paddle steamer PS Canberra, an iconic riverboat associated with Australia’s inland river transport heritage. The design highlights the side-wheel paddle steamer moored against a timber wharf, reflecting the importance of river navigation in regional trade and passenger movement. Rendered in a clean, illustrative style typical of mid-to-late 20th-century Australian issues, the stamp forms part of Australia’s transport and maritime thematic tradition. A desirable single for collectors of ships, inland waterways, and Australian transport history, and an excellent thematic addition to riverboat or maritime exhibits.