"Park Street" Token (Id: Arcade Token)

I found this token in a roll of nickels not too long ago. It has a carousel horse on one side, and on the other side a circus tent with the words 'Park Street' under it. There is also some lettering under the horse, which reads RWM (someone's initials?). The token has roughly the same dimensions of an American nickel and weighs 4.15 grams. I am at a complete loss as to where this token might have come from, so any info would be greatly appreciated.