| Image Thumbs | |
| Cert Num | 1223870 |
| Cert Date | 2010-06-07 |
| Catalog Number | 548 |
| Country | USA |
| Year | 1920 |
| Denom | 1c |
| Color | Green |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, left margin Plate No. 12420 block of six with toning on the back in the ungummed selvage and lighter toning on the gum. |
| Cert Link | http://psestamp.com/Cert/1223870 |