| Image Thumbs | |
| Cert Num | 1280468 |
| Cert Date | 2014-02-28 |
| Catalog Number | C18 |
| Country | USA |
| Year | 1933 |
| Denom | 50c |
| Color | Green |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 21171 block of six (the top left, top right and bottom stamps never hinged), the bottom right stamp with natural gum skips and the top center stamp with a small thin. |
| Cert Link | http://psestamp.com/Cert/1280468 |