Attractive pair of Pittsburgh Pirates-related cards from the tougher Canadian Topps issues.  Collection includes: 1) 1971 O-Pee-Chee #603 Pirates Team: Graded VG 3 by PSA with some edge wear and corner chipping consistent with the grade.  2) 1973 O-Pee-Chee Checklists Pittsburgh Pirates: Graded NM-MT 8 by PSA, with strong corners and rough-cut top and bottom edges as is typically seen with O-Pee-Chee cards.  Two cards total.