"It was thought these metal discs were shoulder protectors, perhaps for women carrying heavy loads," said Ms Larsson.
But she said researchers comparing them with figurines found at the site realised they seemed to have been worn as a metal bra. - Scotsman.com, Uplifting evidence for Viking lingerie range
As you can see from the historical image, it just makes sense that it was a bra. Ah, History and What We Think We Know! So excited to see history properly remapped.
I see it much like the change from the world being flat, to round to globe. As our understanding changes, we recognize it as "discovery". Really, it's just the addition of new minds asking different questions and providing new answers.
If you ask me.