AK 3652, el tercer prototipo P & M Twin en “The Motorcycle” de Noviembre de 1914. La cilindrada se incrementó a 770 cc y los cambios eran P & M de cuatro velocidades.
AK 3652, the third Prototype P & M Twin in "the motorcycle" in November 1914. The engine capacity increased to 770 cc and the changes were four-speed P & M.


Credit: The MotorCycle