Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. - Common Market Law Review View Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. by - Common Market Law Review Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. 30 2 Common Market Law Review