50 Seniti - Taufa'ahau Tupou IV

This issue appeared in the same year Tonga's coinage was decimalized, replacing the old pound-shilling system under which the kingdom had operated since the late nineteenth century. The 1968 series marked the first coinage to bear Taufa'ahau Tupou IV's effigy following his accession in 1965, and the denomination structure was redesigned wholesale to align with regional Pacific trends toward decimal currency.