| Image Thumbs | |
| Cert Num | 1285071 |
| Cert Date | 2014-06-20 |
| Catalog Number | C9 |
| Country | USA |
| Year | 1927 |
| Denom | 20c |
| Color | Yellow green |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 18891 block of six (the bottom left stamp never hinged) with natural gum creases. |
| Cert Link | http://psestamp.com/Cert/1285071 |