P 203/403, DC alternator (17mm belt width). Suitable for Peugeot 203 + 403, Vespa 400. New part! 50A, 12 Volt. But

it is actually a modern AC alternator with integrated alternator regulator, in the classic DC housing. The advantages are: Much more stable power output even at low speeds, much lighter (approx.4.5kg), very durable. The alternator regulator must be bypassed for connection (wiring diagram enclosed).