Hi, here is the first set & cars made by SRM around 1959. The set has 2 cars ,a ferrari & a vanwall, both are 1/40 scale. They use a romford terrier 7-pole motor. The wheels are steel unlike the later SRM cars.the controllers are round & push button on & off. I got this set from Roger Greenslade. I think this may be the only known first-series SRM set to exist.