10 Leva

Bulgaria's 1962 note series was issued under the tight political alignment of the Zhivkov era, and the choice to print in Moscow through Goznak — the Soviet state printing authority — was as much a political statement as a practical one. Several Eastern Bloc countries used Goznak during this period, though not all advertised the arrangement openly.

The watermark is the sole mechanical security feature, modest even by the standards of the time. Notes from this series are common in circulated grades; uncirculated survivors are less so, as Bulgaria's cash economy meant heavy day-to-day use of mid-denomination notes throughout the 1960s.