| Image Thumbs | |
| Cert Num | 1369271 |
| Cert Date | 2019-11-15 |
| Catalog Number | 514 |
| Country | USA |
| Year | 1917 |
| Denom | 15c |
| Color | Gray |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 10617 block of six ( the top stamps and bottom left stamp NH), the bottom center and bottom right stamps with rejoined vertical perfs. |
| Cert Link | http://psestamp.com/Cert/1369271 |