Bulgaria: 100 Leva Zlato ND(1960) P. 20c with red overprint "Series A" and red ornament overprint in center, and with serial prefix "K". This type of note is only known in combination with prefix letter "A" but maybe this type is only missing in the Pick listing or a contemporary forged overprint on a real note. We are not sure about that. The note is used with center and some handling in paper, no holes, still strongness in paper and original colors, condition: VF-.