bo55BO-55, also known as Master, was an astromech droid of a discontinued model that was picked up by Ravagers pirate Torque, who rebuilt and reprogrammed him into a blood-thirsty killingBirmingham (BO55 L) Number Plates. Number Plates. BO. BO55. BO55 L. Below is a selection of vehicle registration plates first registered in Birmingham between 1 September 2005 and 28