0.50 Koruna

Tuzex was Czechoslovakia's state-run foreign currency retail network — a controlled valve that allowed citizens to spend hard currency or hard-currency vouchers on imported goods otherwise unavailable through normal socialist distribution. These bony, as the vouchers were colloquially known, functioned as a parallel internal currency and were issued in fractional denominations precisely because Western goods were priced down to the pfennig equivalent. The system simultaneously extracted hard currency from citizens who received remittances from abroad and created a grey market in the vouchers themselves, since possession of actual foreign banknotes was legally restricted.

STC printed the series under tight state control, but the vouchers were never legal tender and carried no guarantee of redemption outside the Tuzex network.