100 Dollars - Elizabeth II B Series, Conch Shell

The Cayman Islands Currency Board, established by the Currency Law of 1971, issued its own dollar pegged at a fixed rate to the US dollar — a rate that has held without devaluation ever since, making the Cayman dollar one of the highest-valued currencies in the world by face exchange. That stability is a deliberate policy choice tied directly to the islands' offshore financial sector, not an accident of size or geography.

Thomas De La Rue's involvement in this series is unsurprising given their longstanding role printing currency for British Overseas Territories. The B Series was a relatively long-lived issue before polymer substrates began displacing cotton paper across the Caribbean.