Titus Calypsomatic - The best watch money can buy Mid-size 32mm Calypsomatic watch by Solvil & Titus. Houses the ETA2472 automatic movement. Most of these came with a tropic strap, so I'm unsure if this is the original bracelet. Admired for their clean looks. Designed by famous watchmaker Paul Ditisheim. Produced mainly from 1960 to 1962 into the 70's. “Solvil et Titus is a former swiss company founded in 1887 in La Chaux de Fonds, Neuchatel, Switzerland by Paul Ditisheim and later developed by Paul Bernard Vogel. Solvil et Titus is responsible for inventing the affix balance. Thanks to Paul Ditisheim inventions, he was able to make the most precise chronometers ever made. By 1903, his watches were awarded by the Kew and Neuchâtel Observatories contests. In 1912, he won the world's chronometric record of the Royal Kew Observatory.[6] He also worked closely with Physics Nobel prize winner Charles-Edouard Guillaume and has been considered the father of the modern chronometers. According to Professor M. Andrade of the Besançon Astronomical Observatory, Solvil et Titus Ditisheim's devices "constitute the most important progress of modern chronometry"