Certified Proofs of California (Box 7)
About the Project
Since 1863, certified proofs allowed the Bureau of Engraving and Printing to examine every intaglio printing plate before it was placed in production. Try transcribing these Californian currency proof sheets. As you work on the project, you'll learn about the rarely exhibited National Numismatics Collection and its proofs of currency, bonds, revenue stamps, checks, and more.