Banco de Espana, a group of progressive proofs for 50 pesetas, 1928, including a obverse printers model without underprint, a obverse proof of underprint in green and orange, a obverse proof of underprint in pink and blue, a obverse proof of underprint in a combination of colours from the previous two notes, a reverse proof of underprint, a reverse proof with overprints design only (Pick 75pp, TBB B519p), in PMG holders 63, 64 Choice Uncirculated, all previously mounted apart from obverse printers model, all with printers annotations, rare and interesting (6 notes)
