Ziss-Modell, originally also called R. W. Modell or Wittek Modell were 'brand' names of the German Mini-Auto firm which made diecast metal classic and contemporary vehicles from the 1960s through the late 1970s. Later, use of the Mini-Auto name largely disappeared and the models were mainly known as Ziss or R. W. Modell. The company was based in Lintorf.