Bauhaus design is a simply, clean, and traditional approach to design invented in Germany.

Minimalistic style where form follow function. Nothing less and nothing more. 

Staatliches Bauhaus was founded in 1919 by Walter Gropius and existed until 1933. A school that taught a simple aesthetic in typical German style.  The German translation literally means "building house".  The style caught on and has been a watch design staple for many years.