![URUGUAY - 1928 - PROOF: 50c scarlet 'Artigas' WATERLOW issue a fine perforated COLOUR TRIAL in unissued colour, gummed with small hole punch and SPECIMEN overprint in black. (SG 563) (URU/3587)](http://latinamericanphilatelics.com/cdn/shop/products/URU3587_{width}x.jpg?v=1613901973)
50c scarlet 'Artigas' WATERLOW issue a fine perforated COLOUR TRIAL in unissued colour, gummed with small hole punch and SPECIMEN overprint in black. (SG 563)
50c scarlet 'Artigas' WATERLOW issue a fine perforated COLOUR TRIAL in unissued colour, gummed with small hole punch and SPECIMEN overprint in black. (SG 563)