| Image Thumbs | |
| Cert Num | 1233533 |
| Cert Date | 2011-02-25 |
| Catalog Number | C23 |
| 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. 21917/21855 block of four with overall toning. |
| Cert Link | http://psestamp.com/Cert/1233533 |