| Image Thumbs | |
| Cert Num | 1328099 |
| Cert Date | 2017-01-12 |
| Catalog Number | C23a |
| Country | USA |
| Year | 1938 |
| Denom | 6c |
| Color | Dark blue & carmine |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, top margin Plate No. F21844/21836 block of four, imperf horizontally. |
| Cert Link | http://psestamp.com/Cert/1328099 |