Hello martino
It looks to me like a Scottish clan badge. Likely belonging to a member of Clan Tait/Tate since there are no reins visible in the design. But, it could also be from a member of either Clan Hepburn or Dunbar.
It's too small to be a broach. And could have been attached to a hat or something similar.
Also, your English is far better than my Swedish!






















