Currently using 777 red white & blue machines with 5 minutes of play 3 times during the tournament (they record your score after each round). Prize is cash per th tournament flyer.

Here's a link to the current news page tournament flyer: https://www.silverstrikers.com/Doc/Archives/Events/Year2017/TournamentSummer2017/Tournament-Summer-Four-Queens-Flyer-2017.pdf

Here's a link from the club archives with the January 2017 Silver Strike Slot Tournament rules, June tournament rules should be similar and are available at the tournament:
https://www.silverstrikers.com/Doc/Archives/Events/Year2017/TournamentWinter2017/Tournament-Winter-Four-Queens-Rules-2017.pdf

Hope this helps.

Jim