THIS SET WAS MADE IN 1963. IT IS BATTERY POWERED & EACH 1/43RD SCALE NOREV CARS CAN BE CONTROLLED SEPARATELY. IF THE CARS CORNER TOO FAST THEY CAN TURN AROUND & GO THE OTHER WAY. THIS IS A RARE SET. THE CARS ARE MOVED BY SPRINGS UNDER THE TRACK. THE 1/32 SCALE CARS WERE MADE IN 1966 & HAVE SUSPENSION A & STEERING. COPIES OF MINIAMIL CARS