Tenyo Hyper ESP Cards (SM6)

With Hyper ESP Cards you can do a perfect "Second Sight" act while standing at a distance from the table. Many different effects are also possible such as mindreading and foretelling the future with the special cards used to test extra sensory perception all of which have five different symbols printed on them. After you learn the special secret of these ESP cards, you'll be able to perform six pieces of mental magic. These cards are marked, and the markings are well hidden within the dotted pattern on the backs of each card.

Japanese packaging, but English instructions available online with enclosed link.

NOTE from Don: These cards are quality made, and the marking system is designed to be read from a distance of 4'-10'. The symbols on the front are bold, with a slight blue tint to them.  I use my set all the time.