1 Lev Foreign Exchange Certificate

Balkan Touriste's foreign exchange certificates were introduced to capture hard currency from visitors while keeping convertible funds out of Bulgarian hands. The system ran parallel to the lev, which was officially inconvertible — tourists were pushed toward these certificates, which could be spent at Corecom shops stocked with imported goods ordinary citizens could not legally access. That retail apartheid was the point.

The 1966 date places this among the earliest issues of the series, before the scheme was restructured under Bulgarska Turisticheska Banka in the 1970s.