it's a springey at the back of a raichle/deeluxe boot.
I, BTW, have one laying somewhere around without a purpose because I figured out I need only one for the rear boot. If anyone needs it, welcome
un rab , qui en veut un?
Moderators: fivat, rilliet, tali, Arnaud, nils, joemzl, Petr, Silber, Alex