The Stone Engravings of the Declaration of Independence are precise, copperplate facsimiles of the original, created by engraver William J. Stone and commissioned in 1820 by then Secretary of State John Quincy Adams.
Of the 50 surviving Stone copies, David owns four. They are on display at the National Archives, National Constitution Center, State Department and New York Historical Society. He also donated reproductions of the document to every U.S. Embassy in the world and donated an 1833 second edition of the document to the Nantucket Historical Association.