| Image Thumbs | |
| Cert Num | 1252561 |
| Cert Date | 2012-07-17 |
| Catalog Number | 511 |
| Country | USA |
| Year | 1917 |
| Denom | 11c |
| Color | Light green |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, top margin Plate No. 12579 block of six. |
| Cert Link | http://psestamp.com/Cert/1252561 |