1937 Tsar Boris III, 19th Anniversary of the accession to the throne, 2L imperforate souvenir sheet of four different colors (size 103x145mm) with "3 October 1937" date printed at bottom, l.h. in margin, stamps n.h., v.f., signed Karaivanoff, with Ceremuga certificate. A rarity from Bulgaria, only 20 printed and distributed to dignitaries (Cat No. B11var) (Image)

Est.US$2,000