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StampSource · si-npm
10c Steamship plate proof
Smithsonian National Postal Museum — Bureau Plate Proofs · US · English
Catalog record
| Line | US |
|---|---|
| Set / series | Smithsonian National Postal Museum — Bureau Plate Proofs |
| Language | English |
| Kind | stamp |
| Place | United States of America |
| Scott | USA Q6 |
| Medium | paper; ink (carmine rose) / engraving |
| Region | us |
| Npm record | npm_0.242263.6591 |
| Description | Certified plate proofs are the last printed proof of the plate before printing the stamps at the Bureau of Engraving and Printing. These plate proofs are each unique, with the approval signatures and date. For postal scholars these plates provide important production information in the plate margin inscriptions, including guidelines, plate numbers, and initials of the siderographer, or person who created the plate from a transfer roll. |
| Oracle ID | 36596154 |
API
GET /v1/cards/36596154
Source credit: Smithsonian National Postal Museum