'Mamíferos del Cenozoico Argentino'.
Four stamps @ 75 c. in sheet;
'Megatherio' (Megatherium), 'Gliptodonte' (Doedicurus),
'Macrauquenia' (Macrauchenia), 'Toxodonte' (Toxodon).
Issue date: 10-th of March.
| C a t a l o g u e n u m b e r s | |||
 |
2642-2645, 73 |  |
2820-2823 |
 |
2228-2231 |  |
2144a-d |
