A video I made for Science Friday, about the John M. Mossman Lock Collection. Tucked into the midtown Manhattan headquarters of the General Society of Mechanics & Tradesmen of the City of New York, the locks and assorted items,  show the evolution of bank and vault lock technology through the 19th and 20th centuries. The current curator of the locks, John Erroll, describes the collection and its significance. Images by Annette Heist and Flora Lichtman.  Audio by Annette Heist. Produced by Annette Heist.