She is a textbook-perfect bad girl — from her raw-edged purple mullet, scarlet lips and snarling scowl to the black leather jacket, ripped leggings and studded boots.

But the model stomping across the runway carries something in her hand that gives the game away. It may display an edgy patchwork motif, but its form and fabrics indicate more luxurious origins — it is in fact a reinvention of an iconic bag much-loved by celebrities and created by the Spanish fashion house Loewe.

The handbag — and the bad-girl fashion it accessorized — was part of the recent unveiling in Tokyo of a refreshing new collaboration between Loewe and Junya Watanabe of Comme des Garçons.