The bonus feature work great and is more fun to play then all the other slot machines. You are missing out of you never played a Bonus Horse head slot machine before. This machine has the unique BONUS feature. Observe the letters at the top right of the machine.When the entire word BONUS is spelled out the machine will pay out 18 coins. This unique trick was to encourage players to play longer. The letters are raised by hitting the corresponding letter in order on the first reel. The letters are printed over the usual classic slot machine numbers. Has the original Mills lock and key, as well as, the original coin box and back door. The back bonnet has a small broken piece in the rear but not noticeable when rear door is in place. Has the original serial number and Mills inspection tag. A great working machine to find in this condition. The item "1930s Mills Bonus Horse Head Antique Slot Machine- Good Working Condition" is in sale since Tuesday, February 28, 2017. This item is in the category "Collectibles\Casino\Slots\Machines\Antique Coin Slot Machines". The seller is "gameroomshow" and is located in Jacksonville, Florida. This item can be shipped to United States.