Reverse The central part features the Coat of Arms of Tonga. Along the upper edge in an arc is the denomination in English: "50 CENTINI", below it the country name in English: "TONGA".
Obverse In the upper part, along the edge of the coin in an arc, is the name of King of Tonga Taufa'ahau Tupou IV in English: "TAUFA'AHAU TUPOU IV", below: "1974" - the year of minting. The central part depicts his right-facing profile.