Uruguay 1930 Centenary of Independence 50c Montevideo Harbour Printer's sample in blue (issued stamp was vermilion) overprinted Waterlow & Sons SPECIMEN with security punch hole without gum, as SG 649
Uruguay 1930 Centenary of Independence 50c Montevideo Harbour Printer's sample in blue (issued stamp was vermilion) overprinted Waterlow & Sons SPECIMEN with security punch hole without gum, as SG 649