
Circa 1940 10c olive 'Servicio Consular' REVENUE issue 'Waterlow' COLOUR TRIAL in unissued colour with 'WATERLOW & SONS LTD SPECIMEN' overprint in black.
Circa 1940 10c olive 'Servicio Consular' REVENUE issue 'Waterlow' COLOUR TRIAL in unissued colour with 'WATERLOW & SONS LTD SPECIMEN' overprint in black.