 The System III tremolo system was designed by John Page, Dan Smith, Charlie Gressett and John Carruthers.The System I, II and III tremolo systems were manufactured in Germany by Schaller.Sometimes parts of the tremolo system are lost and one common modification is to make the bridge function as a hardtail by locking the bridge into a non movable position and installing a string tree for the first and second strings so that the strings don't slip out of the nut slots.