500 Pesos with 'Ley' on Obverse

Argentina's 500-peso notes of this period carry the word "Ley" — short for Ley 18.188 — as part of the denomination, a legal designation introduced in 1970 when the peso moneda nacional was replaced by the peso ley at a rate of 100 to 1. The reform was less a stabilization than an accounting exercise; inflation continued largely uninterrupted through the early 1970s, and notes of this face value were themselves rendered inadequate within a few years.

Two signature combinations exist across the series' short run, both involving Alfredo González as one signatory — an unusual continuity given Argentina's political turbulence at the time. The 1973 pairing with José Beiró corresponds to the final months before Perón's return to power.