Zappler are small clocks that were produced in Vienna in the mid-19th century. These were kept in showcases and had a frontal pendulum oscillating at high speed. The height was between 2 and 20 cm. They were made of pressed brass, porcelain, fire gilded bronze, silver and some were even made of gold. Many of them were also decorated with sapphires, emeralds and semiprecious stones. They can be found placed on ebonized wood substructures and covered by a bell jar as a protective element. As a rule they have an appropriate safe keeping box mantled with velvet or leather. These clocks became collectors' items as soon as they were placed on the market. The master craftsmen Franz Joseph Dorer, Carl Wurm and Anton Lis in Vienna were famous for their Zappler.