Set of seven labels in green, purple, red, brown, blue, grey & orange produced in Oaxaca commemorating the 1910 Centenary of Independence inscribed 'Donativo Voluntario - 1er Centenario de la Independencia Nacional 1810 - 1910'. Each has two red ruled lines across the centre of the stamp to denote Trial or Sample status. All are mint with gum. A very scarce and attractive set, rarely encountered.