4 Shillings

Tonga's prewar banknote series, including this 4-shilling denomination, remained in circulation far longer than originally intended — the 1941 start date reflects initial issue, but the same design ran without redesign through 1966, spanning the reigns of both Queen Sālote Tupou III and the early transition period toward full independence. The unusually long series life for such a small island economy meant that later-dated examples circulated alongside notes printed two decades earlier.

The 4-shilling denomination itself is the oddity here — structurally equivalent to one-fifth of a pound, it reflects the old Tongan monetary divisions that were swept away when the country decimalized in 1967 with the introduction of the pa'anga.