Who's to say the seller didn't find it stuck in a Caithness box?
In charity shops, finding a pretty box to display something in may well occur - and item and box may well be completely unrelated.
(There's an insignificant flat weight with a photo stuck on the base in a Strathearn box in a local one near me.
. The box has a nice satin cushion, it shows the weight off prettily.)
Labels can be removed and restuck, unscrupulous folk dremmel names on things.
I'm not sure where "branded" stuff comes into it, but I avoid anything with brands/logos, they're so ugly.
(I black out a horrid white tick shaped logo on the back of my partner's black jacket with permanent black marker pen so it doesn't show.
You need to know and understand the actual glass work too.