Issued in 1968, this 5¢ Australian commemorative stamp marks the International Ports and Harbors Conference held in Australia. Designed by J. Mason, it beautifully captures the essence of maritime commerce with a vivid depiction of a tugboat guiding a large ocean vessel against a modern harbor backdrop. The stamp highlights Australia's vital role in international trade and port development during the mid-20th century. Printed by the Reserve Bank of Australia (RBA), it remains a striking piece for collectors interested in shipping and industrial themes.