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Image Source. The most disturbing of the ancient currencies may be dolphin teeth, which were used in the Solomon Islands for hundreds of years, in keeping with timeworn traditions. In 2008 the islandâs dollar currency became devalued.
Currencies used by non-state entities, like the Sovereign Military Order of Malta, scrips used by private entities, and other private, virtual, and alternative currencies are not under the purview of this list.