This 20-cent stamp from Tuvalu features the tugboat Wallacia towing a barge near the shore, with lush island vegetation in the background. Issued in the mid-1970s, the design highlights the importance of maritime vessels in Tuvalu’s trade and transport. The stamp carries the black overprint “SPECIMEN”, which was distributed to UPU member nations for archival and reference purposes. Specimen stamps are scarcer than regular issues and sought after by specialists. The crown and “E II R” cypher in the design signify Queen Elizabeth II’s reign.