1890 U.P.U. issue over-complete lot of imperf. die proofs in the issued colours, comprising all of the values in the set (1c with apparently full single die large margins), as well as an additional 1c overprinted SPECIMEN, very good overall condition, also an imperf. proof of the 1894 U.P.U. issue 1c value, an interesting and valuable assembly, some lightly stained from hinge (Image)