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| Cert Num | 1292030 |
| Cert Date | 2014-10-29 |
| Catalog Number | C18 |
| Country | USA |
| Year | 1933 |
| Denom | 50c |
| Color | Green |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, top margin block of four with Plate No. 21177, the bottom left stamp with small natural gum wrinkles. |
| Cert Link | http://psestamp.com/Cert/1292030 |