Change Author / Owner : 5c Seal of the US Naval Academy plate proof
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.
This plate proof has "wrong color should be blue" written on it, and has an attached die proof in the approved color.
Plate No.: 21687
Subject: Seal of the US Naval Academy and Naval Midshipmen