Chronological  History

In 1872  Max Carl Gritzner  founded a company to produce sewing machines, bicycles and motorcycles based in Durlach who became the largest sewing machine factory in Europe

In 1881 the factory was completely destroyed  by fire, ribuilt and then added the production of sewing machines furniture.              

In 1886, the company was converted into a Aktiengesellschaft by the name of "Nähmaschinenfabrik, formerly Gritzner & CoA.G.with stock exchange listing in Berlin and Frankfurt

In 1891 opening of its own iron foundry and a Department of steam machines and pumps.

In 1897 recording of bicycle production

From 1903  motorcycles were produced . Even pumps and steam engines were temporarily in the production program

In 1931 the company Gritzner merged with the "Palatine sewing machine and bicycle factory formerly Gebrüder Kayser AGin Kaiserslautern for "Gritzner-Kayser AG". 

In 1955 another major fire destroyed the entire sewing machines factory in DurlachWeakened Gritzner-Kaiser is easy prey for a competitor based in Kaiserslautern, GM Pfaff AG.

In 1957 the factory was rebuilt by the GM Pfaff AG that takes over the majority of shares.

In 1958 the Gritzner-Kayser AG took over the production facility of motorcycle works for Mars models Monza and Milano, which were delivered in a variety of colors (often: blue, white and red and white). They existed as mopeds (Supersport MonzaMonza Super Sport Deluxesk MilanoMonza skand as a normal scooter. It Sachs and ILO motors are installedThe moped Supersport Monza Deluxe is now sought after by collectors.

In 1965 converted to the operating lease assets at Pfaff into a GmbH.

source :  wikipedia