The two outer marbles are four-vane, four-colors; blue, red, white & yellow. The center is a 4-vane, 3-color; blue, white and red cross-through vanes. I had them pegged as odd MKs - the colors seem a little dull, but structure-wise, they sure look it. But the lack of green, the red cross-through, and Al's comment now have me thinking about foreign possibilities. I think 4-vane multi-color foreign Cat's Eyes aren't very common either though.