It's a slot token from the 30s , I believe and guessing it's the size of a nickle,it came from a company Mills Manufacturing. This company produced a lot of amusement type games,and slot machines, they had 30% of the market and Jennings[another manufacturer about 65%.These were used as tokens in gray market areas to get around laws that prohibited gambling machines. This skirted around the law just enough to keep the business going. Not worth a lot I have a collection of about 30 different ones. Fun to collect, and for me fun because I was in the business in the 70s and heard the stories from the old timers.I would guess the token is from the 30s or 40s.