Argentina, 1973/1976 13 (1/2). different colours

Catalogues:
Michel: 1156, 1176, 1217, 1232/1233
Scott: 937, 940, 1039, 1044, 1048
Stanley Gibbons: 1323, 1328, 1335, 1393
Yvert et Tellier: 953, 975, 1009, 1011, 1024

Artists: Castro Jose

Plots: San Martin Jose