3000 Guaraníes Friendship Bridge

The Friendship Bridge — Puente de la Amistad — connecting Ciudad del Este to Foz do Iguaçu was inaugurated in March 1965, a Brazilian-Paraguayan joint project that physically anchored the two countries' growing economic relationship. Paraguay issued this gold commemorative a decade later as the border crossing was already transforming the Paraguayan side into one of the busiest commercial zones in South America, driven almost entirely by cross-border trade arbitrage.

KM#163 was struck in a limited proof-style issue under the broader 1975 Paraguayan gold commemorative program, which produced multiple denominations simultaneously for the collector market rather than circulation.