| Image Thumbs | |
| Cert Num | 1297749 |
| Cert Date | 2015-02-20 |
| 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, bottom left margin block of six pairs, imperf horizontal the top center pair with a natural gum wrinkle. |
| Cert Link | http://psestamp.com/Cert/1297749 |