Old puzzle made by politechnica. While this version comes in a paper box, the version from Politoys
is boxed in a plastic cylinder. A very detailed description on the variants can be found at the Twisty Puzzles link "How to tell the difference.."
Size: 5.6 x 5.6 x 3.7cm
External LinksTwistyPuzzles: How to tell the difference between all 3 types of Dominoeshttp://twistypuzzles.com/forum/viewtopic.php?t=11478