Sorry, Toots, I only know Crokinole as the back of the Carrom® board. Mine was square (rounded corners in 1948 but square in the newer/cheaper version), with pockets in the corners and twenty-four black and white rings (twelve each) to be propelled by snapping them with your finger, and a checkerboard in the middle and a backgammon board around the edges (as long as there was space for them anyway). And the Crokinole board on the back, pretty much as you described it. It came with an instrucition book describing about eighty-four different games that could be played.

It's still available with a little searching. I got my "new" one twenty-five years ago and a whole set of rings and stuff fifteen years ago, and my (thirty-year-old) son got his own five years ago, to play with his own children.