The original device was donated by its inventor Cagnazzi during the Third Meeting of Italian Scientists. After then, the instrument went lost, but in 1932 ca., thanks to the work of a scholar, it was found in a cellar and exhibited at the Museo Galileo, located in Piazza dei Giudici, Florence. The original device is now stored in the Museo Nazionale Scienza e Tecnologia Leonardo da Vinci, Milan. A copy of the device was commissioned by Count Celio Sabini (from Altamura) and it's now displayed at the museum Archivio Biblioteca Museo Civico, located in Altamura.