The đồng (銅) was the currency of South Vietnam from 1953 to 2 May 1978. It was subdivided into 100 xu, also written su. First đồng, 1953 to 1975 History In 1953, the Vietnam branch of the Institut d'Emission des Etats du Cambodge, du Laos et du Vietnam issued notes dual denominated in piastre and đồng. At the same time, the two other branches of the Bank made similar issues with the riel in Cambodia and the kip in Laos. The đồng circulated in those parts of Vietnam not under the control of the Communist forces, which by 1954 coincided with South Vietnam. Coins denominated in su were also introduced in 1953. In 1955, an independent issue of đồng banknotes was produced by the National Bank of Vietnam. Coins In 1953, 10, 20 and 50 su coins were introduced. In 1960, 1 đồng were added, followed by 10 đồng in 1964, 5 đồng in 1966 and 20 đồng in 1968. 50 đồng were minted dated 1975 but they were never shipped to Vietnam due to the fall of the South Vietnamese government. It is reported that all but a few examples were "disposed of as scrap metal" and the coin is very rare. The coins issued can be roughly classified into five series: Banknotes In 1953, notes (dated 1952) were introduced by the Institut d'Emission des Etats du Cambodge, du Laos et du Vietnam in denominations of 1, 5, 10, 100 and 200 đồng. On 22 September 1955, the Ministry of Finance and Economic Affairs announced that notes from the Bank of Indochina and the Institut d’Emission issues for Cambodia and Laos would be exchanged for Institut d’Emission issues for Vietnam starting 30 September until 7 November. The Institut issues for Cambodia and Laos ceased to be legal tender on 7 October, and all Bank of Indochina notes lost their legal tender status on 31 October following the 15 October introduction of the first notes from the National Bank of Vietnam. Subsequently, the Ngân-Hàng Quốc-Gia Việt-Nam (National Bank of Vietnam) took over the issuance of paper money, introducing 2 and 500 đồng notes in 1955 and 20 and 50 đồng in 1956. Between 1964 and 1968, notes below 50 đồng were replaced by coins. In 1971, 1000 đồng notes were introduced. Due to steady inflation, 5000 and 10000 đồng notes were printed in 1975 but not issued due to the