The rupiah was a separate currency in West New Guinea between 1963 and 1973. It replaced the West New Guinea gulden at par and was replaced by the Indonesian rupiah at a rate of 1 West New Guinea rupiah = 18.9 Indonesian rupiah. This article or section should be merged with Papua (Indonesian province) Map showing West New Guinea region The region of West New Guinea is the western half of the island of New Guinea or Papua, and has also been known as Irian Jaya or West Papua. ... Sample of Rupiah banknote The rupiah is the monetary unit of Indonesia (currency code IDR). ...