This is the Space Quest Silver Set that could be won on a bank of 3 special slot machines. You had to max bet which was 3 quarters (.75 cents) per spin. I don't remember the symbol that would show a winner. But when it showed a winner you stopped play. You had to wait for a hand pay from the attendant who handed you this great set. You had to sign a receipt that you received the set. I remember when I sat to play I was so nervous how much I was going to spend to get a set for myself. I got very luck and won my set after 23 spins for a play cost of $17.25 . I know this because I have a note to myself stuck inside the boxed set I won, and still own.

https://www.silverstrikers.com/Web/Catalogs/Sets/Nevada/LasVegasHiltonLVnv/Las-Vegas-Hilton-LVnv-Sets-Page-02.php/