Lot 42247 – 1912 Issue, complete set of ten values, each represented set of being all values represented in one duo of ABN black proofs on thin white paper affixed to individual cards,

1912 Issue, complete set of ten values, each represented set of being all values represented in one duo of ABN black proofs on thin white paper affixed to individual cards, incl. a proof of the frame only with margin showing amended die number and associated to a diff. proof showing the vignette only with marginal imprint incl. the name of the represented design and « SALVADOR STAMP SPECIAL », also with amended die number; 19 proofs, very scarce.