20 Pesos 'D' Foreign Exchange Certificate-Narrow 'D'

Cuba's Foreign Exchange Certificate series was introduced to manage the flow of hard currency on the island — tourists and those receiving remittances from abroad were required to exchange their dollars for these certificates, which circulated in a parallel economy entirely separate from the peso used by Cuban nationals. The 'D' series was specifically designated for socialist-bloc visitors, whose convertible currency was deemed distinct from capitalist Western money. A practical segregation that tells you everything about how Havana managed ideology against economic necessity in the mid-1980s.

The narrow variant of the 'D' overprint is the scarcer of the two, distinguished solely by the width of the letter — a typographic detail that creates a legitimate catalogue split from what is otherwise an identical note. Státní Tiskárna Cenin had been printing Cuban paper since the revolutionary period, a natural fit given Prague's alignment with Havana throughout the Cold War.