Adolph Lange (1815-1875). Founder of the German precision watchmaking industry in Glashütte.

German silver Special alloy composed of copper and zinc, with a nickel concentration of about 10%. German silver is stronger than brass and has been traditionally used by Lange for the manufacture of plates and bridges. The addition of nickel minimises the oxidation of German silver and thus eliminates the need to electroplate the alloy - it can remain "untreated".

The three-quarter plate was introduced by | Adolph Lange in 1864. Since then, it has been a typical hallmark of Lange watchmaking prowess. Its purpose is to accommodate the going train. Traditionally, it is made of untreated | German silver. In comparison with constructions that have several bridges, the three-quarter plate considerably improves the stability of a movement.