Banco de Espana, a group of progressive proofs for 500 pesetas, 1928, including an obverse printers model without underprint, an obverse underprint with red, green and blue, an obverse proof orange and pink, an obverse proof with a combination of the previous two proofs, a reverse proof without underprint (Pick 77pp1, TBB B521p), combined obverse underprint proof previously mounted, all in PMG holder 63, 64 Choice Uncirculated, rare and interesting (5 notes)
