50 Soles

Pick 194 is part of Peru's redesigned cotton-paper family introduced progressively through the 2010s, before the Banco Central de Reserva committed fully to polymer substrate for the series — a transition that made certain cotton-paper issues in this denomination short-lived in active circulation.

The security specification here — watermark and thread only — sits at the lower end of what contemporary central banks were deploying by 2018, which raised occasional comment from currency security analysts at the time.