Boston Potiknopf, Bell Knob, transparent gold
Boston Potiknopf, Bell Knob, transparent black
Boston Potiknopf, Bell Knob, transparent white
Boston Potiknopf, Bell Knob, lefty, transparent gold
Boston Potiknopf, Bell Knob, lefty, transparent schwarz
Boston Potiknopf, Bell Knob, lefty, transparent amber