@hannsr Thx! They can’t even remember which concert it was. They found the patch in a pocket and don’t remember when or where they bought it - at least *that* they bought it.
So the venue isn’t clear either.

Metal Mystery Patch - help needed!
My kid bought this patch on a concert where this band opened. Unfortunately they remember neither the concert (because the opening act wasn‘t on the ticket) nor the band’s name. And it‘s unreadable.

Google Lense was of no help.
Please boost widely! Thx!