500 Leva Zlato

The "Zlato" (gold) designation was not decorative — it indicated convertibility into gold coin at a fixed rate, a commitment the Bulgarian National Bank made under the gold standard framework adopted after the country's 1880s monetary reorganization. By 1907, Bulgaria was still a principality nominally under Ottoman suzerainty, a political awkwardness that sat uneasily alongside the ambition of issuing a high-denomination convertible note printed in Saint Petersburg.

Three known signature combinations across the series suggest a long active lifespan for the printing, with different governors and cashiers cycling through. The Goznak facility had supplied Bulgarian banknote production since the earliest issues — a practical arrangement given that Bulgaria lacked domestic security printing capacity well into the twentieth century.