This was an option by Porsche a 12 volt starter for your Porsche 356B, 356C and 356A's for folks who have converter their car to a 12volt upgrade. This is a great part to get to finish that restoration project a New 12v Bosch starter. Why settle for used, knowing if it's working or not, when you can buy a 12 Volt Bosch original starter for your Porsche 356A, 356B and 356C. This is sold outright without a core needed. Get your Porsche 356 back on the road with a new Bosch 12v Starter.