Incredibly rare 1972 Verlagspresse Zürich AG Eishockey OS-WM of #40 Ivan Hlinka showing the different variants. Front is identical, but the backs differ. The one on the left is the Finnish, middle one is the Swedish and the one on the right is by far the rarest, Swiss/German variant. It took me nearly 5(!) years to track down a copy of the Hlinka. I'd say the set is the rarest European set that features NHL players, ever.