拍品描述： Banco de Angola, progressive proofs for 1000 escudos (4), ND (1973), with lithographic underprints, various underprint stages and with a watermark depicting Luis de Camoes, (Pick 108p, TBB B432p), all with handwritten elaboration of different stages of working in respective order consisting of 1st, 2nd, 3rd working with the last note having (TRIPLEX) all 3 working stages joined together, in PMG holders, with no grades assigned by PMG, a wonderful selection providing an interesting insight into different stages of printing, scarce (4 notes)

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