1881 Lion of Bulgaria, 3s-30s complete, n.h. and post office fresh, fine-v.f., signed Karaivanoff (catalogue value for hinged) cat. $1082 (Cat No. 6-11) (Image)

Cat. $1082, Est.US$750

1881 25s black and violet, h.r., well centered, fresh and fine stamp, signed Calves, cat. $650 (Cat No. 10) (Image)

Cat. $650, Est.US$250

1885 50s on 1fr black and red, h.r., fine, signed Calves, etc., cat. $500 (Cat No. 22) (Image)

Cat. $500, Est.US$200

1901 Prince Ferdinand I, 1st-3L complete set of 12 (as issued in 1901) imperforate or perforated (1L and 3L) blocks of ten, perforated "OBRAZETZ" (Specimen) (except 1L and 3L overprinted "Obrazets" in red), l.h. or n.h., v.f., rare set of blocks (Mi.50-61S) (Cat No. 57-66,68-69S) (Image)

Est.US$2,000

1931 Tsar Boris III, unissued design 50L brown on cream, imperforate essay on thin card (62x70mm), v.f., with Ceremuga certificate (Image)

Est.US$250

1931 Tsar Boris III, unissued design 50L red on rose, imperforate essay on thin card (62x70mm), v.f., with Ceremuga certificate (Image)

Est.US$250

1931 Tsar Boris III, unissued design 50L blue on yellow, imperforate essay on thin card (62x70mm), v.f., with Ceremuga certificate (Image)

Est.US$250

1931 Tsar Boris III, unissued design 50L blue on pale blue, imperforate essay on thin card (62x70mm), v.f., with Ceremuga certificate (Image)

Est.US$250

1938 Crown Prince Simeon's First Birthday Issue, special perforated souvenir sheet of five, hinged in margin, stamps n.h., usual minor perf. separations, v.f., signed Karaivanoff, with his 1950 and 2016 Ceremuga certificates. A rarity from Bulgaria, only 50 printed, many of which were destroyed or survive in poor condition (Cat No. 336-40var) (Image)

Est.US$2,000

1905 stampless cover from the French Consulate in Roustchouk to Paris, violet cachet on reverse, some toning, otherwise v.f. (Image)

Est.US$150

1885 5s, 25s, 50s imperforate singles, rough paper, l.h., post office fresh, v.f. (Mi.D4x-6bx) cat. €1380 (Cat No. J4-6) (Image)

Cat. €1380, Est.US$500

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