No "one company" used a label like that, it's more of an importer's label, indicating country of origin.
Tracking down a maker from Poland is difficult. There was a large area which had a lot of different makers in Krosno, and you'll sometimes find really good quality work with a label saying that, but that will be older. Around the beginning of the '00s, an importing company, LSA, started bringing a lot of contemporary decorative wares from Poland into the uk and elsewhere, and that's where you'll find these round sticky plastic Made in Poland stickers. You might even find one with LSA on it.
Having said all that, I've never seen anything with applied handles like that, with these labels on and they surprise me.