| Image Thumbs | |
| Cert Num | 1213747 |
| Cert Date | 2009-12-10 |
| Catalog Number | C18 |
| Country | USA |
| Year | 1933 |
| Denom | 50c |
| Color | Green |
| Grade | F-VF 75 |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 21172 block of six (Positions 1 to 5 never hinged), with the selvage trimmed slightly. |
| Cert Link | http://psestamp.com/Cert/1213747 |