- | 45+45c | blvio | Engraving | |||
- | 45+45c | blvio | Engraving, imperf | — | — | |
- | 70+70c | brn | test | |||
- | 70+70c | brn | test, imperf | — | — | |
- | 1+1p | |||||
- | 2.50+2.50p | olgray | letter | |||
- | 5+5p | grn | San Martín |
- | 2.45p+7.55p | grayol |
- | 1+0.50p |
- | 1+0.50p | ol & bl | ||||
- | 2+1p | rose & vio | ||||
- | 3+1.50p | grn & brn | ||||
- | 5+2.50p | olbrn & red | ||||
- | 10+5p | olbrn & sep |
- | 1+0.50p | dkvio | ||||
- | 5+2.50p | graybl |
- | 2+1p | ultra & blk | Airmail | |||
- | 3+1.50p | ol & blk | Airmail |
- | 2+1p | rose & yel | Rhynchotus rufescens | |||
- | 3+1.50p | dkgrn | Rhea americana |
- | 2+1p | pnk | p. 13.5 | |||
- | 6+3p | dkgray | ||||
- | 10.70+5.30p | bl | ||||
- | 20+10p | ltgrn |
- | 6+3p | car | Erythrina crista-galli | |||
- | 10.70+5.30p | brnred | Lapageria rosea |
- | 2+1p | |||||
- | 6+3p | |||||
- | 10.70+5.30p | bl | ||||
- | 20+10p | ltgrn |
- | 1.80+0.90p | blk | Aptenodytes forsteri |
- | 6.50+6.50p | grnbl & dkbl | 15c. Stamp of 1862 |
- | 11+5p | multi |
- | 11+5p | multi | Airmail - Pitangus sulphuratus bolivianus |
- | 11+5p | bl & blk |
- | 18+9p | multi |
- | 18+9p | multi | Tachycineta leucopyga |
- | 27.50+12.50p | multi | Airmail - Furnarius rufus |
- | 10+10p | multi | arms of Argentina |
- | 15+7p | multi | Thraupis bonariensis |
- | 26+13p | multi | Ramphastos toco |
- | 26+13p | multi | Dryocopus lineatus |
- | 40+20c | multi | Phoenicopterus chilensis |
- | 40+20c | multi | Odostethes platensis |