Banco de Angola, progressive proofs (4) for the 20 escudos note of 1973 various underprint stages and with a watermark depicting Luis de Camoes (Pick 104pp), all with handwritten BANCO DE ANGOLA 20 ESCUDOS FRONTS, on each elaborating 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 64 EPQ, 64 EPQ, 63 EPQ 64 EPQ, a wonderful selection provinding an interesting insight into different stages of printing, scarce (4 notes)