1890/1919, extensive mint never hinged/unused and used collection, incl. Officials and Telegraphs, many interesting items and highly specialised material with plate flaws, overprint and perforation varieties, colour proofs, specimen, large multiples, strong sections of Cabo, Bluefields and of the “Vale” overprints, also study of the many Seebeck reprints, together with a few covers and a postal stationery, some forgeries noted. An impressive group, in 10 albums and 6 larges envelopes