STEF is a registered trademark.
The international railway association UIC incorporated two refrigerated cars in its proposals for standardised car construction types. The Standard 1 (St.1) has today become the most common refrigerated car. The national railway in Greece, Morocco, Italy, Switzerland, France, the Netherlands and Belgium purchased ST. 1 refrigerated cars. Private St. 1 cars belonging to the Interfrigo Company were also operated on the Deutsche Bundesbahn network. Meat companies, breweries and food retail chains took these cars out of service. A total of around 6.500 cars were built.
