Marked cards exist ever since people produced playing cards. For the GS marked cards, Aviator marked deck will be a nice choice for people from USA. A original deck of Aviator contains 52 cards and two jokers, blue and red deck of Aviator cards can be marked with black or white marks, they are jumbo index and plastic coated paper material. A good pair of contact lenses is necessary for Aviator marked decks because you cannot see any invisible ink marks on the deck of Aviator marked cards. That's also quite difficult for others to check the marks. If you want to get more information about more marked playing cards, do not hesitate to get in touch with us.