Among the many irons I keep removing from the fire here at the Main Topps Archives Research Complex are those involving O-Pee-Chee, the Topps Canadian marketing partner starting in 1958 and continuing for 35 or so years before things got weird. Even before that they had a distribution agreement in place that may have pre-dated any card issues from the US. It was a complex arrangement in some ways but quite simple in others. I won't get into the vagaries of it all today but you could fill a book (which I won't do either, although others have). However not all O-Pee-Chee sets of that time originated with Topps; most did not but not all.
One such issue was the 1973 O-Pee-Chee Royal Canadian Mounted Police (RCMP for short) set.
55 cards in length, it was issued to celebrate the 100th anniversary of the RCMP. Here is a typical card, mine in fact, which is misdated by PSA: