10 Dollars - Elizabeth II Brimstone Hill, Colourised

Brimstone Hill Fortress on St. Kitts was built almost entirely by enslaved Africans under British military direction between the late 17th and early 19th centuries, and is one of the best-preserved colonial fortifications in the Americas — a UNESCO World Heritage Site since 1999. The Eastern Caribbean Central Bank has issued a recurring series of gold collector pieces tied to regional landmarks, with colourisation applied to bullion-weight issues becoming a standard technique for differentiating commemorative runs within an otherwise identical physical format.

KM#12.1 distinguishes this colourised variant from the non-colourised issue in the same series.