20 Leva Zlato

Bulgaria contracted the Russian Imperial state printing works in Saint Petersburg for this series — a logical choice given the political alignment following the Russo-Turkish War, but also a practical one, since Goznak's intaglio capabilities far exceeded anything available domestically at the time. The "Zlato" designation indicated gold-backing, a claim Bulgaria could credibly make while the Lev remained pegged to the Latin Monetary Union standard.

The sheer number of documented signature combinations — eight across two ink colors and two serial prefix formats — points to an exceptionally long active life in circulation, stretching well past the Balkan Wars of 1912–13. The shift from black to blue ink on later printings was a security measure introduced mid-run, not a separate issue.