In February 2008, the National Postal Museum received a major Smithsonian grant to digitize its certified plate proof collection. In this video the Smithsonian Channel tells the story from start to finish. http://npm.si.edu/collections/collect... Transcript: http://npm.si.edu/collections/pdf/CPP...Out of the Vault: The Certified Plate Proof Collection - YouTube | |
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| Education | Upload TimePublished on 18 Nov 2009 |
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