Friday, September 24, 1971 Portugal will issue: Stamp "Wolframite" face value 1, Stamp "Arsenopyrite" face value 2.50, Stamp "Beryl" face value 3.50, Stamp "Chalcopyrite" face value 6.50,
| Country: | Portugal |
|---|---|
| Issue: | 1st Congress Hispano-Luso-American Economic Geology |
| Date: | 1971-09-24 |
| Print: | Offset and Lithography |
| Perforation: | 12 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 1 Portuguese escudo |
| Print run: | 9000000 |
| Country: | Portugal |
|---|---|
| Issue: | 1st Congress Hispano-Luso-American Economic Geology |
| Date: | 1971-09-24 |
| Print: | Offset and Lithography |
| Perforation: | 12 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 2.50 Portuguese escudo |
| Print run: | 2000000 |
| Country: | Portugal |
|---|---|
| Issue: | 1st Congress Hispano-Luso-American Economic Geology |
| Date: | 1971-09-24 |
| Print: | Offset and Lithography |
| Size: | 41 x 24 |
| Perforation: | 12 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 3.50 Portuguese escudo |
| Print run: | 3000000 |
| Country: | Portugal |
|---|---|
| Issue: | 1st Congress Hispano-Luso-American Economic Geology |
| Date: | 1971-09-24 |
| Print: | Offset and Lithography |
| Perforation: | 12 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 6.50 Portuguese escudo |
| Print run: | 1000000 |