| Image Thumbs | |
| Cert Num | 1297397 |
| Cert Date | 2015-02-09 |
| Catalog Number | C23 |
| Country | USA |
| Year | 1938 |
| Denom | 6c |
| Color | Dark blue & carmine |
| Grade | XF 90 |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, center line block of four. |
| Cert Link | http://psestamp.com/Cert/1297397 |