Travelers checks that Eastern Bloc visitors used when visiting Cuba.

The Banco Central de Cuba had them printed at the Státní tiskárna cenin (STC, State Printing Works), in Prague, then sent them to Bulgaria, Czechoslovakia, East Germany, Hungary, Poland and the USSR. 

Banks in those countries stamped the checks with their distinctive imprints in places like Budapest, Moscow and Leipzig. Customers purchased them and took them to Cuba where they would cash them for FX certificates denominated in pesos, as this was before the CUC existed. Those certificates gave them access to a better selection of products and services than locals got, but less good than visitors from capitalist countries who brought hard currency.

A complete set of the checks consists of 20, 50 and 100 peso denominations.