I like the OPC versions. Picked up a bunch on a cross country trip that had a couple swings into Canada in 78. 78's in the east, and 77s in the Canadian side of Glacier natl park. The person running the souvenir shop was confused when I was excited over last years cards. Apparently they'd just come in
So I showed her the backs and explained how the new ones had 77 stats and hers had 76 stats.
I remember waiting at a table in a flea market for a long time, the guy had shown someone else a 69 Yaz and when the customer wondered about the odd back said it was OPC. I was hoping he'd decide against it, but no luck.
Steve B