They produced watches in stainless steel, silver, gold and platinum, with mechanical movements up to 43 mm.

[4] The first Zeno watches were made in 1922 with each piece marked with a Swiss cross on the back of the casing.

In 1966, Dr. Peter Atteslander and Eric Enggist bought the rights to Zeno and later sold them to Mr. Felix W. Huber in 1973.

Zeno's workshops gained attention in 1969 with the futuristic "Spacemen" model and the production of the vacuum diving watch called the "Compressor.".

Zeno also makes diving watches used by the Swiss Army for their frogmen, with models rated for up to 300 meters (1000 feet) of depth.