Argentine Peso Ley
The Argentine peso ley records a formal 1970 redenomination that soon became the visible prelude to the country’s later inflation-era currency changes.
Quick Facts
Country: Argentina
Code: ARL
Symbol: $ ley
System: Decimal (1 Peso Ley = 100 Centavos)
Status: Withdrawn
Issuer: Central Bank of Argentina
The Story of the Argentine Peso Ley
The peso ley 18.188 became Argentina’s monetary unit on 1 January 1970 under Law 18.188. It replaced the peso moneda nacional at a rate of one peso ley to 100 pesos moneda nacional, removing two zeros from the accounting system while retaining the familiar peso name.
The reform initially simplified prices and banknote values, but it did not remove the underlying inflationary pressures. During the following thirteen years, the denomination structure expanded from low-value notes to 1,000,000 pesos ley. The escalating sequence is one of the clearest monetary records of Argentina’s deteriorating purchasing power before the more compressed reforms of the 1980s.
On 1 June 1983, the peso argentino replaced the peso ley at a rate of one peso argentino to 10,000 pesos ley. Several late peso-ley denominations remained legal tender for a transitional period, but the currency itself had entered a new accounting system and should be catalogued separately.
The peso ley therefore forms a distinct stage between the long-lived peso moneda nacional and the short-lived peso argentino. It should not be merged with either the modern Argentine peso or the later austral.
Design & Symbolism
Peso-ley banknotes preserve Argentina’s late classical engraving tradition. Portraits of General José de San Martín provide institutional continuity, while the reverses use civic architecture, military monuments and national emblems to connect the currency with state formation and public memory.
The 500-peso issue pairs San Martín with the Monument to the Army of the Andes at Cerro de la Gloria. The 1,000-peso design turns to Plaza de Mayo, the Casa Rosada and the May Pyramid. These compositions balance portraiture with sites that represent independence, government and collective identity.
Guilloché fields, oak branches, engraved borders and clearly separated denomination panels give the notes a controlled visual structure. Later issues retained this formal language even as the number of zeros increased, creating a striking contrast between stable design conventions and weakening monetary value.
For WorldBanknotes.eu, the 1982 500- and 1,000-peso examples provide a direct original-scan comparison of the mature series shortly before the 1983 reform.
For collectors
The peso ley offers a clearly bounded collecting field extending from the first 1970 issues to the final high denominations of the early 1980s. A basic collection can follow denomination progression, while a specialised collection can separate dates, signatures, watermarks and printing varieties.
Late notes are especially useful for documenting inflation because the designs remain visually disciplined while denominations expand into hundreds of thousands and one million pesos. This makes the series more than a sequence of large numbers: it shows how a traditional banknote system absorbed monetary stress before a formal replacement became unavoidable.
Collectors should keep the peso ley, peso argentino, austral and modern peso as separate Currency entities. The conversion dates and rates belong in the catalogue record, but they do not make the notes interchangeable.
Introduced at 1 peso ley = 100 pesos moneda nacional and replaced at 10,000 pesos ley = 1 peso argentino.
