Collecting the Top 100 O-Pee-Chee Hockey Cards. More than 350 black and white photos including pictures of card fronts and card backs from six decades. The top 100 hockey cards were selected from four eras: O-Pee-Chee's earliest years (from 1933 to 1941); the Original Six era (1942 to 1967); the Expansion Era (1968 to 1979); and the Gretzky Years (1980 to 1989).