| Image Thumbs | |
| Cert Num | 1342799 |
| Cert Date | 2018-02-14 |
| Catalog Number | 511a |
| 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. 13469 block of six, the bottom left stamp Scott No. 511a, with transition perf 10/11 at bottom. |
| Cert Link | http://psestamp.com/Cert/1342799 |