Monday, April 8, 1940 United States of America will issue: Stamp "John James Audubon" face value 1, Stamp "Dr. Crawford W. Long" face value 2,
| Country: | United States of America |
|---|---|
| Issue: | Famous Americans Issue - Scientists |
| Date: | 1940-04-08 |
| Print: | Recess |
| Perforation: | 10½ x 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 1 United States cent |
| Print run: | 59000000 |
| Country: | United States of America |
|---|---|
| Issue: | Famous Americans Issue - Scientists |
| Date: | 1940-04-08 |
| Print: | Recess |
| Perforation: | 10½ x 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 2 United States cent |
| Print run: | 58000000 |