![URUGUAY - 1930 - PROOF: 5c red 'Centenary of Independence' issue, imperf 'Waterlow' COLOUR TRIAL in unissued colour mounted on card with 'Waterlow & Sons Ltd SPECIMEN' overprint in black. (SG 643) (URU/31142)](http://latinamericanphilatelics.com/cdn/shop/products/URU31142_{width}x.jpg?v=1613901861)
5c red 'Centenary of Independence' issue, imperf 'Waterlow' COLOUR TRIAL in unissued colour mounted on card with 'Waterlow & Sons Ltd SPECIMEN' overprint in black. (SG 643)
5c red 'Centenary of Independence' issue, imperf 'Waterlow' COLOUR TRIAL in unissued colour mounted on card with 'Waterlow & Sons Ltd SPECIMEN' overprint in black. (SG 643)