<page_title> Rikky von Opel </page_title> <section_title> Complete Formula One World Championship results </section_title> <table> <cell> 1973 <col_header> Year </col_header> </cell> <cell> Ensign N173 <col_header> Chassis </col_header> <row_header> Team Ensign </row_header> </cell> </table>
In the 1973 season, Opel has N173.