pt777 comPlay the most exciting on casino games at 777 - wide selection of slots, jackpots, Roulette, Blackjack and live casino & a Welcome Bonus. (T&C's Apply)What Are 777 Slots? The lucky number 7 can be traced back to the late 19th century, when Charles Fey invented the first one-armed bandit slot machine called Liberty Bell. 777 slots