This is definitely an early WATLING--(called THE LITTLE SIX) see photo number 4(inside of back head casting). The item "WATLING LITTLE SIX-counter wheel pay out slot" is in sale since Tuesday, April 30, 2019. This item is in the category "Collectibles\Casino\Slots\Machines\Antique Coin Slot Machines".
The seller is "cailledog" and is located in Porter Ranch, California. This item can be shipped to United States.