The April Clocks, Watches & Scientific Instruments sale will offer a variety of curiosities including a rare Tiffany & Co. astronomical slave clock marked no. 2, and two rare French papier-mache anatomical models by the renowned artist Dr. Louis Auzoux. There will be additional items from the John Gelson Hamilton archives and a West Coast scientific collection of small, intricate devices and instruments, as well as over eighty lots of pocket watches by makers like Patek Philippe, IWC, and Zenith, and a single-owner offering of early European tools spanning a variety of trades.