| Image Thumbs | |
| Cert Num | 1259504 |
| Cert Date | 2013-01-28 |
| Catalog Number | C1 |
| Country | USA |
| Year | 1918 |
| Denom | 6c |
| Color | Orange |
| Grade | F 70 |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, centerline block of four. |
| Cert Link | http://psestamp.com/Cert/1259504 |