A Mills ''Silver Slipper'' 10 cent slot machine. 1028 Second quarter 20th century, marked ''Mills Novelty Co. / Chicago, U.S.A. / Trade / Mark'', a lever-operated spinning reel slot machine, painted and chromed metal within an oak case, with key, 26.5'' H x 16'' W x 15.75'' D, est: $1000/1500. Note: Due to laws regulating the sale of antique ...Web