777 is used on most slot machines in the United States to identify a jackpot. As it is considered a lucky number, banknotes with a serial number containing 777 tend to be valued by collectors and numismatists. The US Mint and the Bureau of Engraving and Printing sells uncirculated 777 $1 bills for this reason.
This brilliant sign-up offer is as simple as a smile: Join 777Casino; receive an email and click on its link to play your 77 free spins.