1 Koula - Salote Tupou III

Salote Tupou III ruled Tonga from 1918 until her death in 1965, and her international profile rose sharply after her appearance at the coronation of Elizabeth II in 1953 — she rode in an open carriage through the London rain, refusing to have the hood raised, and became one of the most talked-about figures at the entire ceremony. This koula was struck near the end of her reign, part of a limited gold coinage issued as Tonga began navigating its path toward full independence from British protection, achieved in 1970.

The .91666 fineness corresponds to the traditional 22-karat standard used across British-influenced minting practice.