The so called „Dachluhr“ (as the contemporaneous “Laterndluhr”) represents the last and internationally most important highlight of Viennese horology. The movements of these regulators belonged to the most precise during the first half of the 19th century and made the Viennese clockmakers famous across the globe. The name “Dachluhr” (“roof clock”) derives from the shape of their straight cases with gables or sometimes semicircular pediments. The cases are usually made out of mahogany veneer. They have large areas of glass to make the high quality movement visible.