Lot 42134 – 1911-28, Presidents and Colonel Váldez, complete sets of six and three duos of black proofs for the 1911-28 and 1915-17 issues, on thin white paper affixed to individual cards,

1911-28, Presidents and Colonel Váldez, complete sets of six and three duos of black ABN proofs for the 1911-28 and 1915-17 issues, on thin white paper affixed to individual cards, with each denomination of these issues being represented by a complete proof of the design or alternatively a proof of the frame only with margin showing file number amended with a larger five-figure die number, each associated to a proof of the vignette only with marginal imprint incl. « ECUADOR STAMP SPECIAL », the name of the President/Colonel and altered die number, 18 proofs, very scarce.