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In 1944, nine coins were found on Marchinbar Island, the largest island in the Wessel Islands of the Northern Territory of Australia. While four coins were identified as Dutch duits dating from 1690 to the 1780s, five with Arabic inscriptions were identified as being from the Kilwa Sultanate. The coins are now held by the Powerhouse Museum, Sydney, Australia. In 2018 another coin, also thought to be from Kilwa, was found on a beach on Elcho Island, another of the Wessel Islands.