Here are nice specimens of the 8 centavos Rivadavia. Here are quick links to pages with large images of each of the four values: 8 centavos Rivadavia / 16 centavos Belgrano / 20 centavos Dalmacio Velez Sarsfield / 24 centavos San Martin ; to pages with high quality specimens of each of the four values: 8 centavos Rivadavia / 16 centavos Belgrano / 20 centavos Dalmacio Velez Sarsfield / 24 centavos San Martin ; to pages with some postmarks for three of the values: 8 centavos Rivadavia / 16 centavos Belgrano / 24 centavos San Martin ; and pages for the 24 centavos San Martin showing: plate varieties / banknote selvage / perforation varieties