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| Cert Num | 1366397 |
| Cert Date | 2019-10-28 |
| Catalog Number | 564b |
| Country | USA |
| Year | 1928 |
| Denom | 12c |
| Color | brown violet |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, top margin Plate No. F19442 block of six on special booklet paper (stamps NH). |
| Cert Link | http://psestamp.com/Cert/1366397 |