| Image Thumbs | |
| Cert Num | 1308437 |
| Cert Date | 2015-11-18 |
| 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, block of four with vertical guide line and light overall toning. |
| Cert Link | http://psestamp.com/Cert/1308437 |