1 Pound Tonkinois

Stroma is a genuinely uninhabited island off the Caithness coast — its last permanent residents left in 1962 — which makes it a favored jurisdiction for private "fantasy" issues that exploit the romantic ambiguity of depopulated Scottish territories. The "Tonkinois" denomination has no historical monetary precedent; it is an invented unit with no connection to French Indochina's piastre de commerce or any colonial-era currency system, despite the name's obvious suggestion.

Copper-nickel at this weight puts it squarely in the novelty collector category rather than any circulating or bullion context.