1850 (ca) cover from Michalowice to Warszawa, with perfect departure and "Franco" in red, arrival pmk on back, minor backflap tears, otherwise fine (Image)

Est.$150

1860 10k blue & rose, canceled "241" in concentric rings (Wloclawek), struck over previous "1" cancel, small faults, fine example of Postal Fraud (Cat No. 1) (Image)

Est.$300

1860 10k blue & rose, thin paper, canceled "1" in concentric rings (Warszawa), brilliant colors and well centered for issue, signed Gebruder Senf, Diena, etc. (Cat No. 1) (Image)

Est.$500

1860 10k blue & carmine, canceled "1" in concentric rings (Warszawa), brilliant colors and well centered for issue, signed Raybaudi, with his 2000 certificate (Cat No. 1) (Image)

Est.$500

1860 10k light blue & rose, beautiful delicate colors, canceled "1" (Warszawa), fresh and fine, signed Jendroszek, with his 2015 certificate (Fi.1ac) (Cat No. 1a) (Image)

Est.$300

1860 10k blue & rose, added blue frame for inner oval, canceled by "1" in concentric rings on small piece, fine and rare stamp, signed Wiatrowski, cat. $1400 (Cat No. 1c) (Image)

Cat. $1400, Est.$1,000

1880 (12 May), FL from Antoine Berezovski to Ladislas Mickiewicz (son of Adam Mickiewicz) in Paris. Antoine Berezovski, a Polish patriot, was sentenced to penal servitude for life for attempting to assassinate Tsar Alexander II, on June 6, 1867, on the occasion of his visit to Paris. Berezovski, who was 18 at the time, fired into a carriage in which the Tsar, the Emperor Napoleon and his two sons were driving in the Bois de Boulogne. The Pole was tried, condemned and shipped to New Caledonia. A fascinating letter (written in French), with appropriate markings including "T", various transit and arrival pmks, ex-Stanczykowski collection (Image)

Est.$1,000

1916 Germania "Deutsches Reich" 3pf, 10pf, 20pf, 30pf and 60pf five different, each overprinted "Polen" in Gothic letters, each stamp with top selvage folded over and adhered to gummed portion at top, fresh and v.f. group of unissued overprints, with 1981 Dr.Hochstadter certificate, ex-Grabowski collection (Image)

Est.$3,500

1916 Germania overprinted in Gothic letters with unaccepted "Gen-Gouv. Warschau" on 3pf, 5pf, 10pf, 20pf, 25pf, 30pf, 50pf and 60pf, eight different, each stamp with top selvage folded over and adhered to gummed portion at top, fresh and fine-v.f. group of unissued overprints, with 2004 Mikulski certificate (the overprint was eventually accepted with altered letter "Ch" of "Warschau". These proofs have been discovered in DDR archives, extremely rare), ex-Grabowski collection (Image)

Est.$9,000

1916 Germania overprinted in Gothic letters with unaccepted diagonal "Gen-Gouv. Warschau" on 5pf, 10pf, 20pf, 25pf, 30pf, 50pf and 60pf, seven different, each stamp with top selvage folded over and adhered to gummed portion at top, fresh and fine-v.f. group of unissued overprints, with 2004 Mikulski certificate (the overprint was eventually accepted with altered letter "Ch" of "Warschau". These proofs have been discovered in DDR archives, extremely rare), ex-Grabowski collection (Image)

Est.$9,000

1916 Germania overprinted with unaccepted "Gen-Gouv. Warschau" on 3pf, 5pf, 10pf, 20pf, 25pf, 30pf, 50pf and 60pf, eight different, each stamp with top selvage folded over and adhered to gummed portion at top, fresh and fine-v.f. group of unissued overprints, with 1981 Dr.Hochstadter certificate. A rarity from Poland, ex-Grabowski collection (Image)

Est.$9,000

1916 Germania overprinted with diagonal "Gen-Gouv. Warschau" on 3pf, 5pf, 10pf, 20pf, 25pf, 30pf, 50pf and 60pf, eight different, each stamp with top selvage folded over and adhered to gummed portion at top, fresh and fine-v.f. group of unissued overprints, with 1981 Dr.Hochstadter certificate. A rarity from Poland, ex-Grabowski collection (Image)

Est.$9,000

1918 20pf ultramarine, l.h., v.f., signed Mikstein, Jungjohann, cat. $775 (Cat No. 21b) (Image)

Cat. $775, Est.$500

1918 Lublin Issue, set of three, each with inverted overprint, n.h., v.f., signed Lenkiewicz and Korszen (Cat No. 27a-29a) (Image)

Est.$200

1919 Lublin Issue, 3hal on 3h olive gray perf. 12 3/4, overprint inverted, h.r., v.f., signed Rachmanow, Lenkiewicz, also Korszen, with his 2012 certificate. A rare stamp (Fi.20No,15,000zl) cat. $3900 (Cat No. 30a) (Image)

Cat. $3900, Est.$1,000

1919 Lublin Issue, inverted overprints, ten different, including brown surcharge (error), first one l.h., others n.h., signed Dr.Kronenberg, Korszen, etc. (Cat No. 31a-40a) (Image)

Est.$250

1919 Krakow Issue, 3h bright violet, position I-6, l.h., v.f., signed Mikstein, etc., also Dr.Kronenberg, with his 1986 certificate, cat. $500 (Cat No. 41) (Image)

Cat. $500, Est.$150

1919 Krakow Issue, 6h deep orange, pos.I-30 and I-73-B2,B3, double dot and defective "A" in "Polska" varieties, the latter used, signed Bojanowicz, Korszen, etc. (Fi.45,900zl) (Cat No. 43var) (Image)

Est.$150

1919 Krakow Issue, 10h magenta, pos.I-11, h.r., v.f., signed Mikulski, Jungjohann, etc., also Dr.Kronenberg, with his 1987 certificate, cat. $500 (Cat No. 44) (Image)

Cat. $500, Est.$150

1919 Krakow Issue, 12pf light blue, pos.I-73-B2, double dot variety, l.h., v.f., signed Bojanowicz, also Korszen, with his 2008 certificate (Fi.34,1,000zl) (Cat No. 45var) (Image)

Est.$150

1919 Krakow Issue, 12pf light blue, pos.I-30-B3, defective "A" in "Polska", l.h., v.f., signed Koopman, Korszen, etc. (Fi.34,1,200zl) (Cat No. 45var) (Image)

Est.$150

1919 Krakow Issue, 40h olive green, pos.I-30 and I-73-B2,B3, double dot and defective "A" in "Polska" varieties, l.h. or h.r., fine-v.f., signed Mikstein, Taipale, Korszen, etc. (Fi.40,1,300zl) (Cat No. 46var) (Image)

Est.$200

1919 Krakow Issue, 50h blue green, horizontal pair pos.I-29-30, the latter defective "A" in "Polska", 60h deep blue, pos.I-30 and I-73-B2,B3, double dot and defective "A" in "Polska" varieties, the former middle stamp in strip of three n.h., fine-v.f., signed Mikstein, Korszen, etc. (Fi.41-42,1,960zl) (Cat No. 47,48var) (Image)

Est.$200

1919 Krakow Issue, 90h red violet, canceled Krakow 3 Feb 1919, position I-50, v.f., signed Dr.Kronenberg, with his 1983 certificate, cat. $1400 (Cat No. 50) (Image)

Cat. $1400, Est.$300

1919 Krakow Issue, 1kr carmine, pos.I-30 and I-73-B2,B3, double dot and defective "A" in "Polska" varieties, l.h. or h.r., fine-v.f., signed Korszen (Fi.45,1,000zl) (Cat No. 51var) (Image)

Est.$150