The Watergate Trial conversations, released on May 28, 1980, constitute twelve and one-half hours (12½) of excerpted Nixon White House tape conversations. These conversation segments were played in open court in U.S. v Mitchell, et al. and U.S. v. Connally in 1974.
The tapes played in court were edited from 60 hours of recordings subpoenaed by the Watergate Special Prosecution Force. After the Watergate court cases were resolved, these tapes were turned over to the National Archives and Records Administration (NARA). All records of these court proceedings not otherwise under seal are publicly available from the National Archives.
These conversations can be found on 24 reference audio cassettes at the Nixon Library in Yorba Linda, California, and the National Archives and Records Administration facility in College Park, Maryland.