3 Pesos 'C' Foreign Exchange Certificate-Round 'C'

Cuba's Foreign Exchange Certificate series was a parallel currency system designed to capture hard currency from tourists and diplomats while keeping it separate from the peso economy. The "C" series — distinguished by the overprinted round "C" — was introduced specifically to segregate spending by foreign visitors from that of Cuban nationals, who faced strict prohibitions on holding or using these notes domestically. It was currency apartheid by another name.

Státní Tiskárna Cenin, the Czechoslovak state security printer, produced much of Cuba's paper currency throughout the Cold War period, a natural pairing given the two countries' close political alignment after 1960.