1916-1934 Proofs and Samples group. An attractive collection comprising 220+ stamps, including at least 70 likely-to-be proofs and 28 with "Muestra" overprint. Additionally imperforate stamps, with interesting values such as Scott #632 ("Abrazo de Acatempam"). One Mepsi certificate.

1917, 1p black and blue featuring center of the 5 pesos value, never hinged. Faint creases or wrinkles. A rare error. Cert. Mepsi (2013). Scott $800. (Image)

"EL ABRAZO DE ACATEMPAN" THE RAREST STAMP OF MEXICAN PHILATELY A GREAT GEM OF THE INVERTED CENTERS OF THE WORLD 1921 10c blue and brown, "El Abrazo de Acatempan" with inverted center, delicately used with a faint strike of Mexico City cds ("bridge type") with indistinct date, leaving the design so clear, slightly centered to right. Trivial paper disturbance confined to the margin at lower right, mentioned for the sake of accuracy. Cert. P.F. (1995), backstamped by John K. Bash. Undoubtedly considered as the most important stamp of Mexican philately, with only two examples recorded, this being the finer. The other example known possesses a duplex cancellation which is believed to have been applied in Guadalajara, and which was struck covering a large place of the center inverted. Illustrated in the "Encyclopedia of Rare and Famous Stamps" by L. N. Williams (published by David Feldman, Geneva, in 1993), as the only stamp representing Mexico in this highly renownedencyclopaedia . A true world rarity. Provenance (according to the research by L.N. Williams): Mr. Roterberg (Mexican specialist of Chicago) Alfred E. Fritz Otto C. Yag Eric Koenig Note on the issue: This stamp was issued to celebrate the centenary of the War of Independence. The stamp displays the characters of... According to Eladio Garcia Prada the design was by Alfredo Barron and the engraving by Emiliano Valades. Legend is than one of the two known copies was found in New York by a young collector inside a mixture of used stamps. ... (Image)

1934, Pro University 1c to 10p, complete set mint never hinged, all stamps well centered and fresh. Scott $3,430. (Image)

1934 10p brown, imperforate proof pair, very good margins. Small natural paper wrinkle at top, otherwise very fine, with very few proofs known from this issue. (Image)

1934 10p brown and violet, mint block of four, extremely fresh, very lightly hinged at top, a bit centered to bottom, slightly yellowish gum. Tiny thin spot in lower right stamp. A very rare multiple. Scott $14,000. (Image)

1934 10p brown and violet, without watermark, slightly centered to bottom, exhibiting a very rare sheet margin. It is believed than only 100 stamps without watermark were issued. Scott $3,250. (Image)

THE PRO-UNIVERSITY 10 PESOS WITHOUT WATERMARK IN BLOCK OF FOUR 1934 10p brown and violet, without watermark, a magnificent block of four, lightly hinged at top, outstandingly well centered and remarkably fresh. A very rare and desirable multiple of this rarity. A great rarity of Mexican modern philately (no multiples of this stamp were gathered in the Eric Koenig collection). As this is the first time that we see a block of four of this stamp, we have checked with an expert of Mepsi about the rarity of this item, and we have been informed that this is the first example of this multiple seen by him. Scott $13,000 as singles hinged (two stamps are n.h. in this example). Sold for $27,000 hammer price in December 2003 (Cherrystone, New York, lot #2380). Cert. Mepsi (2023). (Image)

1936 10c red, "SECRETARIA" watermark, a quite well centered used example. Fine. Cert. Mepsi (2023). Scott $650. (Image)

1930’s Kosel "essays" group of 57 examples sold to philatelists in the 1930's by Herman Clement Kosel from Germany. A very complete assembly of these "essays".

1885 set of six values affixed to two archive pieces with "SPECIMEN" hs, very fine. (Image)

1885 50 bani brown-yellow on yellowish, vertical pair, in combination with 1890 25 bani ultramarine, three singles, all on registered cover from Bucarest to Hamburg, three wax seals on reverse, a scarce high franking. (Image)

1885-89 10 bani red on yellow, two horizontal pairs (one on front and the other on reverse), on 1887 registered cover from Spaveni to Bucarest, neatly tied by superb strike of the double-circle SPAVENI/6.JUN.87 ds in red, with straight line RECOM alongside, attractive and scarce. (Image)

1890 10 bani pinkish red, diagonally bisected on a small neat 1893 envelope to Loco, tied BUCURESCI/13.JAN.93, a scarce usage. (Image)

1891 10 bani red and 15 bani olive-brown, vertical pair, on 1893 registered letter from Burdujeni to Botosani, tied by crisp clear blue double-circle BURDUJENI/23.AUG.93/ GARA, arrival bs, very fine. (Image)

1894 3 bani violet, rough perf. 11 1/2 x 13 1/2, watermarked "PR", mint and mint nh block of 80, showing array on minor plate flaws, some perf. separations, a fine and scarce multiple for the specialist and student. Mi. 95, €880+. (Image)

1894 5 bani green, tied on 5 bani black on rose postal card, from Galatz to Ueblingen bei Bohndorf with arrival postmark "BONDORF IN WURTTBG 29 MRZ 94", redirected to Uhlingen (Baden) with an affixed railway label including Wurttemberg Railway Post Office., unusual (Image)

1878-90, lot of three items including two scarce 1867 "Dom Pedro" 200r black postal stationery envelopes (one reduced at left) sent registered from Pernambuco and Sao Paulo to Germany, additionally franked for 200 réis with "Cabeça Grande" 200r pale lilac-rose (sheet margin also applied and tied to cover) and "Cruzeiro" 200r violet, as well as internal cover bearing single "Barba Branca" 200r. (Image)