This miscut of 552 is currently on ebay. Just a hint of the orange back of a card can be discerned. To me, it matched 566 Cuellar, and if true, then that would put 566 in the spot between McFarlane & Mahaffey, with 532 above McFarlane & 552 above Cuellar. However, my graphics ability is limited, so this would need someone to confirm.
1966_552_edge_back.jpg