20 Emalangeni - Sobhuza II 75th Anniversary of the King; reverse trial

Trial pieces for this 1974 issue were produced ahead of the circulating commemorative marking Sobhuza II's 75th year — at the time, he was already the world's longest-reigning monarch, having ascended to the Swazi throne in 1921. Reverse trials like this exist to test die alignment, metal flow, and edge definition before committing to full production runs, and are rarely preserved outside mint archives. Sobhuza would continue reigning until his death in 1982, a tenure of over 60 years.