Su Coin: Fractional Currency of South Vietnam

Illustrated Specimen Details: Su Coin

Example Specimen: 10 Su, 1953 (State of Vietnam)

Historical Context: The State of Vietnam (1949-1955) was a governmental entity that existed first as a member of the French Union and later as a country. The state claimed authority over all of Vietnam during the First Indochina War, although large parts of its territory were controlled by the Democratic Republic of Vietnam (North Vietnam). In 1955, the Republic of Vietnam (South Vietnam) was proclaimed, whose army, with American assistance, engaged in a prolonged war with North Vietnam.

Design Details: The obverse prominently displays the denomination 10 SU flanked by rice stalks (Asian rice or Oryza sativa — "oryza" being a classical Latin word for "rice" while "sativa" means "cultivated") and the inscription VIỆT-NAM. The reverse features three women representing the three distinct regions of the country (South Vietnam, Middle Vietnam, North Vietnam) alongside the legend QUỐC-GIA VIỆT-NAM (State of Vietnam). Around the date, you can find a cornucopia and a wing, which serve as the mint mark and the privy mark of the engraver, Lucien Georges Bazor.

1. SOUTH VIETNAM — State of Vietnam (1953) and Republic of Vietnam (1960): su = 1/100 dong.

History and Linguistic Origin of the Su

About the name of the coin "su": Interestingly, the su coin was used in South Vietnam during the 1950s in parallel with the equivalent xu coin. South Vietnamese exchange coins exhibit a curious inconsistency: 10 and 20 su were issued in 1953, followed by 50 xu in 1953, 50 su in 1960, and 50 xu in 1963. Why one-hundredth of a dong utilized the "su" spelling during this specific period, rather than the more traditional "xu" variant, remains unclear without obvious logic or regularity. However, it is safe to say that the emergence of the coin name "su" (and apparently "xu") is deeply connected to the French chapter of Vietnamese history. The coin was named after the French sol (later sou), which in turn derived its name from the ancient Roman solidus (a famous ancient gold coin).

Monetary Role and System Structure

Within the South Vietnamese monetary system, exactly 100 su equaled 1 đồng. This denomination functioned as the primary decimal subdivision of the currency. The overall monetary structure reflected a unique intersection of French colonial influence and local Vietnamese monetary traditions, having been established during the final phase of French colonial rule in Indochina and actively continued by the Republic of Vietnam throughout the Cold War era.

Physical Characteristics and Numismatic Appeal

Su coins were typically struck in lightweight materials such as aluminum, as well as zinc and nickel-brass alloys. Common fractional denominations included 10, 20, and 50 su pieces. Their designs frequently highlighted national emblems, agricultural motifs like rice plants, and modernist mid-20th-century styling that reflected Cold War-era state symbolism. Today, South Vietnamese coinage represents an important field of Cold War numismatics, with collectors placing special value on first-year issues, military-era circulation coins, and rare proof or pattern strikes.

End of Circulation

The su served as crucial everyday fractional money and retail change during a profound period of political instability, warfare, and economic transition. Following the conclusion of the Vietnam War and the subsequent reunification of the country under communist rule in 1975, the distinct South Vietnamese monetary systems were abolished. Consequently, the su permanently ceased to exist as an independent circulating denomination.