A rare master made by 'Telefonbau und Normalzeit' of Germany. Beauifully engineered, this clock would have controlled a number of 'slave' clocks around a factory to give consistent time throughout the premises. Electrically powered. No expense spared on the casing and glass door making it both attractive as well as functional. By the 1980's quartz had taken over from the electrically powered clocks. This is now a collectors item but is also perfect for a contempoary home.