| Image Thumbs | |
| Cert Num | 1319542 |
| Cert Date | 2016-08-03 |
| Catalog Number | C21 |
| Country | USA |
| Year | 1937 |
| Denom | 20c |
| Color | Green |
| Grade | XF 90 |
| Description | Mint OGnh |
| Opinion | it is genuine unused, o.g., never hinged, with a purple ink mark at the right. |
| Cert Link | http://psestamp.com/Cert/1319542 |