| Image Thumbs | |
| Cert Num | 1336331 |
| Cert Date | 2017-10-04 |
| 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, block of four, the top stamps Scott No. 511 the bottom stamps perf 10 at bottom (the bottom left stamp with transitional perfs) with overall toning and perf faults at the bottom. |
| Cert Link | http://psestamp.com/Cert/1336331 |