BrickLink - Part 3437pe1 : LEGO Duplo, Brick 2 x 2 with Black and White Eye with Spot Pattern on Opposite Sides [DUPLO, Brick, Decorated] - BrickLink Reference Catalog
BrickLink - Part 3437pb049 : LEGO Duplo, Brick 2 x 2 with Eye, Small with White Spot and Curve Pattern on Two Sides [DUPLO, Brick, Decorated] - BrickLink Reference Catalog
BrickLink - Part 3437 : LEGO Duplo, Brick 2 x 2 [DUPLO, Brick] - BrickLink Reference Catalog
BrickLink - Part 3437pb010 : LEGO Duplo, Brick 2 x 2 with Black and White Slanted Alligator / Crocodile Eye Pattern on Opposite Sides [DUPLO, Brick, Decorated] - BrickLink Reference Catalog