1957: Foundation of the company Schray in the goat shed by Wilhelm Schray
1963/1964: New construction of the hall
1973: Extension of the workshop
1979: Office expansion
1980-1986: Factory construction and two extensions
1997: Takeover of the company Schray by Volker G. Kilian
2019: Takeover of the company by Julia and Sven Heinzelmann
