| Image Thumbs | |
| Cert Num | 1272904 |
| Cert Date | 2013-11-08 |
| Catalog Number | C9 |
| Country | USA |
| Year | 1927 |
| Denom | 20c |
| Color | Yellow green |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, bottom margin block of four with Plate No. 18891 with faults and nearly separated vertically. |
| Cert Link | http://psestamp.com/Cert/1272904 |