Relics linked to America’s most famous political assassinations are heading to auction next weekend, including “previously unknown and unseen” film footage of former first lady Jacqueline Kennedy draped over her husband’s body as it sped away from his slaying at Dallas’s Dealey Plaza.

The 8 mm film offered at Boston’s RR Auction on Saturday, Sept. 28, provides the only known images of John F. Kennedy’s motorcade taken after the November 22, 1963 assassination captured by the famous Zapruder film.

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