The April Clocks, Watches & Scientific Instruments auction holds a variety of treasures for horological collectors. Highlights include rare American clocks from the collection of John Hadden, Chapel Hill North Carolina, several New England tall clocks, a rare Tornek-Rayville TR-900 Vietnam-era dive watch, French and European wall and mantel clocks, Vienna long-duration floor and wall regulators, and an array of American and European pocket and wristwatches. Other highlights include a rare Violano Virtuoso, the world’s only self-playing violin and piano, along with several other disc and cylinder musical boxes.