Hello Ragazzi I found two different springs for the rear brake pedal spring. I looked at the catalogues and there werent some modification made. There is only one number 20619. One spring has 3 turns and the other have only one.
This can be possible that the springs were modified but the part no. stayed the same and didnt change. What I saw the lambretta ld have a simular spring. I cant remember from where I get this multi turn spring. The other is with the paper is from denmark and is marked as iso part with the right part no.