Uruguay 1930 Centenary of Independence 20c Montevideo Harbour Printer's sample in red-brown (issued stamp was slate-blue) overprinted Waterlow & Sons SPECIMEN with security punch hole without gum, as SG 647
Uruguay 1930 Centenary of Independence 20c Montevideo Harbour Printer's sample in red-brown (issued stamp was slate-blue) overprinted Waterlow & Sons SPECIMEN with security punch hole without gum, as SG 647