50 000 Intis With inner security thread

Peru's inti was introduced in 1985 to replace the sol at a rate of 1,000 to one, itself a response to accelerating inflation. By 1988, that inflation had become hyperinflation — the inti lost roughly 1,700% of its value that year alone — and the 50,000-inti denomination, unthinkable at the currency's launch, was already struggling to keep pace with daily prices.

The inner security thread distinguishes this from earlier printings of P#142, which lacked it. Rome's Istituto Poligrafico e Zecca dello Stato produced the series throughout, an unusual arrangement given that Peru had domestic printing capacity, but one that reflected the Banco Central's preference for tighter production controls during a period of acute monetary instability.