Lot 30007 – 1892-1905 “Tres Próceres” Issue, an amazing assembly of proofs, essays and specimens

1892-1905 “Tres Próceres” Issue, an amazing assembly of proofs, essays and specimens, with 160+ die proofs incl. many composite die proofs, each including two, four or six examples, 600 essays on paper and card with many in blocks of four and some with marginal imprints (the great majority imperforate), and 350 stamps overprinted “Muestra” (the great majority in multiples or part sheets). A spectacular and unique lot, probably being the largest available of this kind. Viewing highly recommended.