| Image Thumbs | |
| Cert Num | 1360550 |
| Cert Date | 2019-06-14 |
| Catalog Number | E11 |
| Country | USA |
| Year | 1917 |
| Denom | 10c |
| Color | Ultramarine |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, block of four, with light natural gum bends. |
| Cert Link | http://psestamp.com/Cert/1360550 |