3/6/1951 - 3/29/1951
The prosecution presented this JELL-O box during the trial of Julius and Ethel Rosenbergs for espionage. The prosecution contended it was used to verify identities at secret meetings. The prosecution stated that Julius Rosenberg cut apart the side panel giving his brother-in-law and sister-in-law, David and Ruth Greenglass, one half and Harry Gold the other. Each would present their two sections upon meeting.
National Archives, Records of the U.S. Attorneys and Marshals