World Banknotes: Bulgaria Bulgarian National Bank, a vignette of Tsar Boris III as used on the 5000 Leva of 1925, and another showing an aerial view of the Iskar Defile, as used on the reverse of the 500 Leva of 1929, both backed on brown card, extremely rare (2 vignettes) BNB B153, 158, Pick 49, 52 for types £300-£400