We had a fantastic store called Rich's Five and Dime on Ludlow Ave. in Cincinnati. Not only did we buy full boxes of 67, 68 and 69 Topps.... they had Topps' Player Posters of 1968 and Topps Team Posters of 1969. I've heard these referred to as "test issues" but perhaps they were more widespread.
Anyway, my brother and I were able to collect the complete sets of both, and we defaced our bedroom walls much to our mom's chagrin.
Better Days!