Hello my 2 cents,,
I live in Bangkok, Thailand. I live local, among the Thai people. There is a Thai snooker center and there they have a :
1986 Casino Electronics horse racing game. They have a setup with a number of buttons where you place THB 10 coin bets on the odds for 2 horse combinations.
I Googled a bit more and it is the King Derby game. It is not in a professional game enclosure/box setup, but dismantled. Fantastic!
Below the button-board is a vault. The money drops into the vault and at the lower right in the vault is a wooden box where they pay out and drop the winnings.
I play there 2 times per week. Great simple fun.
Thanks for that information. Great that something so old is still in use! Can you post a photo of the machine?