| Image Thumbs | |
| Cert Num | 1420485 |
| Cert Date | 2023-01-11 |
| Catalog Number | E12a |
| Country | USA |
| Year | 1922 |
| Denom | 10c |
| Color | Deep ultramarine |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is genuine unused, o.g., never hinged, bottom margin block of four with plate number 13920. |
| Cert Link | http://psestamp.com/Cert/1420485 |