| Image Thumbs | |
| Cert Num | 1346305 |
| Cert Date | 2018-05-25 |
| Catalog Number | 507 |
| Country | USA |
| Year | 1917 |
| Denom | 7c |
| Color | Black |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, top margin Plate No. 7924 block of six (the top left, top right and bottom stamps NH) with a natural paper inclusion in the plate no. selvage. |
| Cert Link | http://psestamp.com/Cert/1346305 |