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Stamps › US › Smithsonian National Postal Museum — Bureau Plate Proofs › 8c Airplane Radiator and Wooden Propeller plate proof
8c Airplane Radiator and Wooden Propeller plate proof

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8c Airplane Radiator and Wooden Propeller plate proof

Smithsonian National Postal Museum — Bureau Plate Proofs · US · English · 1923

Catalog record

LineUS
Set / seriesSmithsonian National Postal Museum — Bureau Plate Proofs
LanguageEnglish
Year1923
DateAugust 11, 1923
Kindstamp
Year1923
PlaceUnited States of America
ScottUSA C4
Mediumpaper; ink (dark green) / engraving
Regionus
Npm Recordnpm_0.242263.14613
DescriptionCertified 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.
Image SourceSmithsonian Open Access
Image LicenseCC0
Oracle ID36595474

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Source credit: Smithsonian National Postal Museum