| Image Thumbs | |
| Cert Num | 1311820 |
| Cert Date | 2016-01-10 |
| Catalog Number | C18 |
| Country | USA |
| Year | 1933 |
| Denom | 50c |
| Color | Green |
| Grade | F 70 |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, top margin block of four with Plate No. 21171. |
| Cert Link | http://psestamp.com/Cert/1311820 |