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StampSource · si-npm
3c Colorado plate proof
Smithsonian National Postal Museum — Bureau Plate Proofs · US · English · 1951
Catalog record
| Line | US |
|---|---|
| Set / series | Smithsonian National Postal Museum — Bureau Plate Proofs |
| Language | English |
| Year | 1951 |
| Date | July 13, 1951 |
| Kind | stamp |
| Place | United States of America |
| Scott | USA 1001 |
| Medium | paper; ink (blue violet) / engraving |
| Region | us |
| Npm record | npm_0.242263.16054 |
| 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 | 36594982 |
API
GET /v1/cards/36594982
Source credit: Smithsonian National Postal Museum