10 Shillings Sterling

Tonga's paper currency began with a deliberate act of institutional conservatism. The Kingdom had operated under a monetary system tied to British sterling since the 1875 constitution, and these early De La Rue issues of 1921 were designed to reinforce that alignment rather than assert any distinct financial identity. The Government of Tonga — not a central bank — was itself the issuing authority, which was unusual even by Pacific standards at the time.

De La Rue's involvement guaranteed technically competent production, but surviving examples from this issue are genuinely rare. The small island population meant print runs were modest, and tropical humidity in the South Pacific is notoriously destructive to paper stock.