| Image Thumbs | |
| Cert Num | 1392356 |
| Cert Date | 2021-03-22 |
| Catalog Number | 563 |
| Country | USA |
| Year | 1922 |
| Denom | 11c |
| Color | Greenish blue |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, bottom margin Plate No. 19137 block of six with altered color. |
| Cert Link | http://psestamp.com/Cert/1392356 |